Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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