Cita APA (7a ed.)

Waddington, G., & Taylor, M. (1935). Principles of biology. John Murray.

Cita Chicago Style (17a ed.)

Waddington, G., y Monica Taylor. Principles of Biology. London: John Murray, 1935.

Cita MLA (9a ed.)

Waddington, G., y Monica Taylor. Principles of Biology. John Murray, 1935.