APA ציטוט

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

Trích dẫn kiểu Chicago

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

ציטוט MLA

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