APA
Clifford N., . (1996). Encredible Earth. New York: A DK Publishing Book.
Chicago
Clifford Nick, . 1996. Encredible Earth. New York: A DK Publishing Book.
Harvard
Clifford N., . (1996). Encredible Earth. New York: A DK Publishing Book.
MLA
Clifford Nick, . Encredible Earth. New York: A DK Publishing Book. 1996.
