Hawkins, G., & Zimring, F. E. (1988). Pornography in a free society. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Hawkins, Gordon, agus Franklin E. Zimring. Pornography in a Free Society. Cambridge [England]: Cambridge University Press, 1988.
Lua MLA (9ú heag.)Hawkins, Gordon, agus Franklin E. Zimring. Pornography in a Free Society. Cambridge University Press, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.