Cita APA (7a ed.)

Needham, J. G., & Sargent, W. D. (1950). About ourselves: Man's development and behavior from the zoological viewpoint. George Allen & Unwin.

Cita Chicago Style (17a ed.)

Needham, James George, y William D. Sargent. About Ourselves: Man's Development and Behavior from the Zoological Viewpoint. London: George Allen & Unwin, 1950.

Cita MLA (9a ed.)

Needham, James George, y William D. Sargent. About Ourselves: Man's Development and Behavior from the Zoological Viewpoint. George Allen & Unwin, 1950.