Chappell, M. N. (1949). Worry and its control. New York, N.Y.: Collier Books.
シカゴスタイル引用形Chappell, Matthew N. Worry and Its Control. New York, N.Y.: Collier Books, 1949.
MLA引用形式Chappell, Matthew N. Worry and Its Control. New York, N.Y.: Collier Books, 1949.
警告: この引用は必ずしも正確ではありません.