The Quiet American 1958 film
http://www.dailymotion.com/video/xmtw80_the-quiet-american_shortfilms
The complete 1958 adaptation of the novel. It is very unlike the text (and Graham Greene hated it!) so it's interesting to compare the two.
In Our Time No Man Is a Neutral
http://www.nytimes.com/books/00/02/20/specials/greene-quiet.html
The 1956 New York Times' review of The Quiet American. It's highly critical (the reviewer read the novel as being very anti-American!).
Shades of Greene
https://www.theguardian.com/books/2004/sep/18/classics.grahamgreene
Praise from celebrated author Zadie Smith for Graham Greene's legacy.