Cita APA

Purves, W., Orians, G. H., Heller, H. C., & Sadava, D. (1998). Life: The science of biology (Fifth edition.). Sinauer Associates, Inc.

Citación estilo Chicago

Purves, William, Gordon H. Orians, H. Craig Heller, and David Sadava. Life: The Science of Biology. Fifth edition. Sunderland, Massachusetts: Sinauer Associates, Inc, 1998.

Cita MLA

Purves, William, et al. Life: The Science of Biology. Fifth edition. Sinauer Associates, Inc, 1998.