The primary classifications for a Bill of Lading (BOL) are based on its negotiability. A Straight Bill of Lading is non-negotiable; it is issued to a specifically named consignee who is the only party authorized to accept the delivery. An Order Bill of Lading is negotiable; it is issued "to the order of" a specified party, meaning the ownership of the goods can be transferred to another party through endorsement. These two types are fundamental documents in domestic and international trade, defining how the title to the goods is handled.

A. linear and circular Bill of Lading: "Linear" and "circular" are not recognized classifications for Bills of Lading. These terms typically describe economic models or process flows, not shipping documents.

B. order and extended Bill of Lading: While "order" is a valid type of BOL, "extended Bill of Lading" is not a standard classification. It may be a colloquialism but is not a formal category.

C. straight and standard Bill of Lading: While "straight" is a valid type of BOL, "standard Bill of Lading" is a general descriptor, not a distinct legal classification in contrast to "straight" or "order."

1. United States Code, Title 49 - Transportation. This official government source legally defines the different types of bills of lading.

49 U.S. Code § 80103(a)(1): Defines a nonnegotiable bill as a "straight bill of lading."

49 U.S. Code § 80103(b)(1): Defines a negotiable bill as an "order bill of lading."

2. United Nations Conference on Trade and Development (UNCTAD). This publication provides guidance on best practices for transport documents.

UNCTAD/SDTE/TLB/2003/4, "Bills of Lading: A Guide to Good Practice," Page 5, Section 1.3.2: "Bills of lading are either negotiable or non-negotiable. A non-negotiable bill of lading is often called a 'straight' bill of lading or a 'waybill'." It further explains that an order bill of lading is the primary example of a negotiable document.

3. Ghiani, G., Laporte, G., & Musmanno, R. (2013). Introduction to Logistics Systems. John Wiley & Sons. This academic textbook is widely used in university logistics programs.

Chapter 10, Section 10.4.1 "The Bill of Lading": "The bill of lading can be straight (non-negotiable) or to order (negotiable). In the first case, the carrier must deliver the goods only to the consignee specified in the document... In the second case, the bill of lading represents the title to the goods..."