Cita APA

Ordway, R. J. (1972). Earth science (2a. ed.). US: D. Van Nostrand Company, New York.

Citación estilo Chicago

Ordway, Richard J. Earth Science. 2a. ed. US: D. Van Nostrand Company, New York, 1972.

Cita MLA

Ordway, Richard J. Earth Science. 2a. ed. US: D. Van Nostrand Company, New York, 1972.