1. The Appraisal Institute. (2013). The Appraisal of Real Estate (14th ed.). The direct capitalization formula, Value = Income / Rate (V=I/R), is a fundamental concept explained in the chapter on the Income Capitalization Approach. (See Chapter 17, "Income Capitalization Approach: Direct Capitalization").
2. Virginia Department of Professional and Occupational Regulation (DPOR). (2023). Virginia Real Estate Board Licensing Regulations, 18VAC135-20-340. Curriculum for salespersons; principles and practices of real estate course. The state-mandated curriculum requires instruction on the "Valuation of real property," which includes the "Income approach to value" as a core competency for licensure.
3. Brueggeman, W. B., & Fisher, J. D. (2019). Real Estate Finance & Investments (17th ed.). McGraw-Hill Education. Chapter 9, "Valuation of Income Properties: Appraisal and the Market for Capital," explicitly details the direct capitalization method using the formula: V = NOI₁ / R₀, where V is the value, NOI₁ is the first-year Net Operating Income, and R₀ is the capitalization rate.