Gaya APA

PROTHERO, D, R., DOTT, R, H, J. (2004). EVOLUTION OF THE EARTH SEVENTH EDITION (TUJUH). New York: HIGHER EDUCATION.

Gaya MLA

PROTHERO, DONALD, R., DOTT, ROBERT, H., JR. "EVOLUTION OF THE EARTH SEVENTH EDITION". TUJUH New York: HIGHER EDUCATION, 2004. Text.