Yager, Y. (2002). When friendship hurts: How to deal with friends who betray, abandon, or wound you. New York: Fireside.
Trích dẫn kiểu ChicagoYager, Yan. When Friendship Hurts: How to Deal With Friends Who Betray, Abandon, or Wound You. New York: Fireside, 2002.
Trích dẫn MLAYager, Yan. When Friendship Hurts: How to Deal With Friends Who Betray, Abandon, or Wound You. New York: Fireside, 2002.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.