Punch, K. (2006). Developing effective research proposals (2nd ed.). SAGE.
Lua i Stíl Chicago (17ú heag.)Punch, Keith. Developing Effective Research Proposals. 2nd ed. London ; Thousand Oaks: SAGE, 2006.
Lua MLA (8ú heag.)Punch, Keith. Developing Effective Research Proposals. 2nd ed. SAGE, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.