Παραπομπή APA

Guilford, J. P. (1971). Psychometric methods (2nd ed.). Mcgraw Hill Book Co.

Παραπομπή Chicago Style

Guilford, J P. Psychometric Methods. 2nd ed. New Delhi: Mcgraw Hill Book Co, 1971.

Παραπομπή MLA

Guilford, J P. Psychometric Methods. 2nd ed. Mcgraw Hill Book Co, 1971.