Punch, K. F. (2016). Developing effective research proposals (3rd edition.). Sage.
Cita Chicago (17th ed.)Punch, Keith F. Developing Effective Research Proposals. 3rd edition. Los Angeles: Sage, 2016.
Cita MLA (9th ed.)Punch, Keith F. Developing Effective Research Proposals. 3rd edition. Sage, 2016.
Atenció: Aquestes cites poden no estar 100% correctes.