Gaya APA

Physical Geology:Earth Revealed. (2009). New York: [s.n.].

Gaya Chicago

Physical Geology:Earth Revealed. eighth. New York: [s.n.], 2009. Text.

Gaya MLA

Physical Geology:Earth Revealed. eighth. New York: [s.n.], 2009. Text.

Gaya Turabian

Physical Geology:Earth Revealed. New York: [s.n.], 2009. Print.