APA (7th ed.) Citation

Helfer, J. R. (1953). How to know the grasshoppers, cockcroaches [as printed] and their allas printed: Pictured-keys for identifying many of the grasshoppers, crickets, Katydids, earwigs, termites, cockroaches, praying mantids, rock-crawlers, and walkingsticks occuring in North America, north of Mexico. W.C. Brown Co..

Chicago Style (17th ed.) Citation

Helfer, Jacques R. How to Know the Grasshoppers, Cockcroaches [as Printed] and Their Allas Printed: Pictured-keys for Identifying Many of the Grasshoppers, Crickets, Katydids, Earwigs, Termites, Cockroaches, Praying Mantids, Rock-crawlers, and Walkingsticks Occuring in North America, North of Mexico. Dubuque, Iowa: W.C. Brown Co., 1953.

MLA (9th ed.) Citation

Helfer, Jacques R. How to Know the Grasshoppers, Cockcroaches [as Printed] and Their Allas Printed: Pictured-keys for Identifying Many of the Grasshoppers, Crickets, Katydids, Earwigs, Termites, Cockroaches, Praying Mantids, Rock-crawlers, and Walkingsticks Occuring in North America, North of Mexico. W.C. Brown Co., 1953.