Cita APA

Velikovsky, I. 1., & Velikovsky, I. 1. (1977). Earth in upheaval. New York, New York: Pocket.

Citación estilo Chicago

Velikovsky, Immanuel 1895-, y Immanuel 1895- Velikovsky. Earth in Upheaval. New York, New York: Pocket, 1977.

Cita MLA

Velikovsky, Immanuel 1895-, y Immanuel 1895- Velikovsky. Earth in Upheaval. New York, New York: Pocket, 1977.