"National Book Awards – 1968". National Book Foundation. Diakses 28 Maret 2012. (With essay by Harold Augenbraum from the Awards 60-year anniversary blog.)
pulitzer.org
"Novel". Past winners & finalists by category. The Pulitzer Prizes. diakses 28 Maret 2012.
"Drama". Past winners & finalists by category. The Pulitzer Prizes. diakses 28 Maret 2012