APA
Sovak J., . (1995). Snakes of the World. New York: Dover Publications, Inc.
Chicago
Sovak Jan, . 1995. Snakes of the World. New York: Dover Publications, Inc.
Harvard
Sovak J., . (1995). Snakes of the World. New York: Dover Publications, Inc.
MLA
Sovak Jan, . Snakes of the World. New York: Dover Publications, Inc. 1995.