APA Citation

Chappell, M. N. (1949). Worry and its control. New York, N.Y.: Collier Books.

Chicago Style Citation

Chappell, Matthew N. Worry and Its Control. New York, N.Y.: Collier Books, 1949.

MLA Citation

Chappell, Matthew N. Worry and Its Control. New York, N.Y.: Collier Books, 1949.

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