Παραπομπή APA

Keith F Punch. (2016). Developing effective research proposals (3rd edition.). Sage.

Παραπομπή Chicago Style

Keith F Punch. Developing Effective Research Proposals. 3rd edition. London: Sage, 2016.

Παραπομπή MLA

Keith F Punch. Developing Effective Research Proposals. 3rd edition. Sage, 2016.