Cita APA

Leonard, J. N., & Time-Life Books. (1981). Planets. Time-Life Books.

Citación estilo Chicago

Leonard, Jonathan Norton, and Time-Life Books. Planets. Hongkong: Time-Life Books, 1981.

Cita MLA

Leonard, Jonathan Norton, and Time-Life Books. Planets. Time-Life Books, 1981.

Warning: These citations may not always be 100% accurate.