APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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