McPhee, W. N. (1963). Formal theories of mass behavior. Free Press of Glencoe.
Lua i Stíl Chicago (17ú heag.)McPhee, William N. Formal Theories of Mass Behavior. New York: Free Press of Glencoe, 1963.
Lua MLA (8ú heag.)McPhee, William N. Formal Theories of Mass Behavior. Free Press of Glencoe, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.