Παραπομπή APA

Peters, R. (1958). concept of motivation. Routledge & Kegan Paul.

Παραπομπή Chicago Style

Peters, R.S. Concept of Motivation. London: Routledge & Kegan Paul, 1958.

Παραπομπή MLA

Peters, R.S. Concept of Motivation. Routledge & Kegan Paul, 1958.