Cita APA (7a ed.)

Helm, J., & Gruber, J. (1966). Pioneers of American anthropology. University of Washington press.

Cita Chicago Style (17a ed.)

Helm, June, y Jacob Gruber. Pioneers of American Anthropology. Seattle: University of Washington press, 1966.

Cita MLA (8a ed.)

Helm, June, y Jacob Gruber. Pioneers of American Anthropology. University of Washington press, 1966.