MLA

Longford, Nicholas T, et al. Studying Human Populations. Springer New York, 2008.

APA

Longford, N. T, Casella, G., Fienberg, S., & Olkin, I. (2008). Studying Human Populations. Springer New York.

Chicago

Longford, Nicholas T., G Casella, S Fienberg, and I Olkin. Studying Human Populations. : Springer New York, 2008.