Gaya APA

Plummer, C, C. et al (2007). Physical geology : Charles C. Plummer, Diane H. Carlson, The Late David McGeary (ed. 11). New York: McGraw-Hill.

Gaya MLA

Plummer, Charles, C.. et al. "Physical geology : Charles C. Plummer, Diane H. Carlson, The Late David McGeary". ed. 11 New York: McGraw-Hill, 2007. Buku.