APA
Buttfield H., . (1999). The secret life of fishes. New York: Harry N. Abrams.
Chicago
Buttfield Helen, . 1999. The secret life of fishes. New York: Harry N. Abrams.
Harvard
Buttfield H., . (1999). The secret life of fishes. New York: Harry N. Abrams.
MLA
Buttfield Helen, . The secret life of fishes. New York: Harry N. Abrams. 1999.