Grahame, J., Pyle, A., & Sugiyama, C. (1994). An inquiry into the principle of population. Routledge / Thoemmes Press.
Lua i Stíl Chicago (17ú heag.)Grahame, James, Andrew Pyle, agus Chuhei Sugiyama. An Inquiry into the Principle of Population. London: Routledge / Thoemmes Press, 1994.
Lua MLA (9ú heag.)Grahame, James, et al. An Inquiry into the Principle of Population. Routledge / Thoemmes Press, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.