Friedl, J., & Whiteford, M. B. (1988). The human portrait: Introduction to cultural anthropology (2nd ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Friedl, John, agus Michael B. Whiteford. The Human Portrait: Introduction to Cultural Anthropology. 2nd ed. Englewood Cliffs, N.J: Prentice Hall, 1988.
Lua MLA (9ú heag.)Friedl, John, agus Michael B. Whiteford. The Human Portrait: Introduction to Cultural Anthropology. 2nd ed. Prentice Hall, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.