Cita APA (7th ed.)

Vernon, P. E. (1958). Educational testing and test-form factors. Educational Testing Service.

Cita Chicago (17th ed.)

Vernon, Philip E. Educational Testing and Test-form Factors. Princeton, N.J.: Educational Testing Service, 1958.

Cita MLA (8th ed.)

Vernon, Philip E. Educational Testing and Test-form Factors. Educational Testing Service, 1958.