Collins, R., & Makowsky, M. (1989). The discovery of society (4th ed.). Random House.
Lua i Stíl Chicago (17ú heag.)Collins, Randall, agus Michael Makowsky. The Discovery of Society. 4th ed. New York: Random House, 1989.
Lua MLA (8ú heag.)Collins, Randall, agus Michael Makowsky. The Discovery of Society. 4th ed. Random House, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.