Cita APA

National Geographic Society, Washington, D.C, Kelly, T., Rosenfeld, M., & Simon, T. (1989). Volcano! The Society.

Citación estilo Chicago

National Geographic Society, Washington, D.C, Tim Kelly, Michael Rosenfeld, and Tom Simon. Volcano! Washington, D.C: The Society, 1989.

Cita MLA

National Geographic Society, Washington, D.C, et al. Volcano! The Society, 1989.