Tolong jelaskan mengenai Catatan dari Khieu Samphan

Barron, John and Paul, Anthony; Murder of a gentle land: the untold story of a Communist genocide in Cambodia, Reader's Digest Press, 1977, ISBN 0-88349-129-X

Esterline, John H. and Mae H., "How the dominoes fell": Southeast Asia in perspective, University Press of America, 1990, ISBN 0-8191-7971-X