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Staw، Barry M. (1976). "Knee-deep in the big muddy: a study of escalating commitment to a chosen course of action". Organizational Behavior and Human Performance. ج. 16 ع. 1: 27–44. CiteSeerX:10.1.1.470.3668. DOI:10.1016/0030-5073(76)90005-2.
Ball, George (July 1, 1965). "Memo from George Ball to President Johnson. A Compromise Solution in South Vietnam". In Gettleman، Marvin E. (1995). Vietnam and America: A Documented History. Grove Press. ص. 282–283. ISBN:978-0-8021-3362-5. مؤرشف من الأصل في 2012-06-16.