APA-referens (7:e uppl.)

NUNNALLY, J. C. (1981). Psychometric theory.-- ed.2. Tata McGraw hill.

Chicago-referens (17:e uppl.)

NUNNALLY, Jum C. Psychometric Theory.-- Ed.2. New Delhi: Tata McGraw hill, 1981.

MLA-referens (9:e uppl.)

NUNNALLY, Jum C. Psychometric Theory.-- Ed.2. Tata McGraw hill, 1981.