APA (7th ed.) Citation

Fridell, R. (1999). Amphibians in danger: A worldwide warning. Franklin Watts.

Chicago Style (17th ed.) Citation

Fridell, Ron. Amphibians in Danger: A Worldwide Warning. New York: Franklin Watts, 1999.

MLA (9th ed.) Citation

Fridell, Ron. Amphibians in Danger: A Worldwide Warning. Franklin Watts, 1999.