Lenski, G. E., & Lenski, J. (1974). Human societies: An introduction to macrosociology (2nd ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Lenski, Gerhard Emmanuel, agus Jean Lenski. Human Societies: An Introduction to Macrosociology. 2nd ed. New York: McGraw-Hill, 1974.
Lua MLA (9ú heag.)Lenski, Gerhard Emmanuel, agus Jean Lenski. Human Societies: An Introduction to Macrosociology. 2nd ed. McGraw-Hill, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.