APA
Mattison C., . (1998). Frogs & toads of the world. London: Blanford.
Chicago
Mattison Chris, . 1998. Frogs & toads of the world. London: Blanford.
Harvard
Mattison C., . (1998). Frogs & toads of the world. London: Blanford.
MLA
Mattison Chris, . Frogs & toads of the world. London: Blanford. 1998.