APA (7th ed.) Citation

HELGOE, Kommor, & Wilhelm. (2005). The anxiety answer book. Sourcebooks.Inc.

Chicago Style (17th ed.) Citation

HELGOE, Kommor, and Wilhelm. The Anxiety Answer Book. Illinois: Sourcebooks.Inc, 2005.

MLA (9th ed.) Citation

HELGOE, et al. The Anxiety Answer Book. Sourcebooks.Inc, 2005.

Warning: These citations may not always be 100% accurate.