APA
Watstein S., Watstein S. & Stratton S. E. (2003). The encyclopedia of HIV and AIDS. New York, NY: Facts On File.
Chicago
Watstein Sarah, Watstein Sarah and Stratton Stephen E. 2003. The encyclopedia of HIV and AIDS. New York, NY: Facts On File.
Harvard
Watstein S., Watstein S. and Stratton S. E. (2003). The encyclopedia of HIV and AIDS. New York, NY: Facts On File.
MLA
Watstein Sarah, Watstein Sarah and Stratton Stephen E. The encyclopedia of HIV and AIDS. New York, NY: Facts On File. 2003.