Παραπομπή σε μορφή APA (7η εκδ.)

Hardyck, C. D., & Petrinovich, L. F. (1975). Understanding research in the social sciences: A practical guide to understanding social and behavioral research. Saunders.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hardyck, Curtis D., και Lewis F. Petrinovich. Understanding Research in the Social Sciences: A Practical Guide to Understanding Social and Behavioral Research. Philadelphia: Saunders, 1975.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hardyck, Curtis D., και Lewis F. Petrinovich. Understanding Research in the Social Sciences: A Practical Guide to Understanding Social and Behavioral Research. Saunders, 1975.