Guion, R. M. (1965). Personnel testing. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Guion, Robert M. Personnel Testing. New York: McGraw-Hill, 1965.
Lua MLA (9ú heag.)Guion, Robert M. Personnel Testing. McGraw-Hill, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.