Thanks for the ping. My article
"Goodfellow's Bedfellows" has some relevant info in the bibliography on the Indochina Resource Center, which played a major role in influencing media coverage of events in Cambodia. I'd particularly recommend this item for well-documented criticism of media coverage of the subject:
Ear, Sophal. "The Khmer Rouge Canon 1975-1979: The Standard Total Academic View on Cambodia". Berkeley: University of California, Berkeley, May 1995.