Cita APA

Young, B. E., Stuart, S. N., Chanson, J. S., Cox, N. A., & Boucher, T. M. (2004). Disappearing jewels: The status of new world amphibians. Arlington, Va.: NatureServe.

Citación estilo Chicago

Young, Bruce E., Simon Nicholas Stuart, Janice S. Chanson, Neil A. Cox, y Timothy M. Boucher. Disappearing Jewels: The Status of New World Amphibians. Arlington, Va.: NatureServe, 2004.

Cita MLA

Young, Bruce E., et al. Disappearing Jewels: The Status of New World Amphibians. Arlington, Va.: NatureServe, 2004.