APA (7th ed.) Citation

Tan, M. L., & Tomas, B. A. (1997). Understanding HIV & AIDS. Health Action Information Network.

Chicago Style (17th ed.) Citation

Tan, Michael L., and Bernard A. Tomas. Understanding HIV & AIDS. Quezon City: Health Action Information Network, 1997.

MLA (9th ed.) Citation

Tan, Michael L., and Bernard A. Tomas. Understanding HIV & AIDS. Health Action Information Network, 1997.