Cita APA

Pearl, R. M. 1., & Pearl, R. M. 1. (1959). Rocks and minerals. New York, New York: Barnes and Noble.

Citación estilo Chicago

Pearl, Richard Maxwell 1913-, y Richard Maxwell 1913- Pearl. Rocks and Minerals. New York, New York: Barnes and Noble, 1959.

Cita MLA

Pearl, Richard Maxwell 1913-, y Richard Maxwell 1913- Pearl. Rocks and Minerals. New York, New York: Barnes and Noble, 1959.