Secondary Sources
Many books have been written about Marilyn Monroe. A selection I have found so far is below:

Marilyn: Her Life in Her Own Words: Marilyn Monroe’s Revealing Last Words and Photographs by George Barris (April 1, 2001)

My Story by Marilyn Monroe and Ben Hecht (September 29, 2006)

Marilyn in Art by Roger Taylor (May 1, 2006)

Marilyn Monroe: Metamorphosis by David Wills (November 8, 2011)

Vanity Fair Magazine Article about–Marilyn Monroe’s hair dresser who was with her the night she sang “Happy Birthday Mr.President”

AMY, F. C. (2003, 06). It had to be kenneth. Vanity Fair, , 140. Retrieved from http://search.proquest.com/docview/201036211?accountid=14541

I also found some great pictures from newspaper articles