APA (7th ed.) Citation

Helfer, J. R. (1987). How to know the grasshoppers, crickets, cockroaches and their allies. New York, NY, USA Dover Publications.

Chicago Style (17th ed.) Citation

Helfer, Jacques R. How to Know the Grasshoppers, Crickets, Cockroaches and Their Allies. New York, NY, USA Dover Publications, 1987.

MLA (8th ed.) Citation

Helfer, Jacques R. How to Know the Grasshoppers, Crickets, Cockroaches and Their Allies. New York, NY, USA Dover Publications, 1987.

IICA/CATIE Citation

Helfer, J. R. 1987. How to know the grasshoppers, crickets, cockroaches and their allies. New York, NY, USA Dover Publications.