Friedl, J. (1981). The human portrait: Introduction to cultural anthropology ([Rev. ed.].). Prentice-Hall.
Cita Chicago (17th ed.)Friedl, John. The Human Portrait: Introduction to Cultural Anthropology. [Rev. ed.]. Englewood Cliffs, N.J: Prentice-Hall, 1981.
Cita MLA (9th ed.)Friedl, John. The Human Portrait: Introduction to Cultural Anthropology. [Rev. ed.]. Prentice-Hall, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.