APA (7th ed.) Citation

Roark, P., & Okun, D. A. (1990). Evaluation guidelines for community-based water and sanitation projects. Water and Sanitation for Health Project.

Chicago Style (17th ed.) Citation

Roark, Philip, and Daniel Alexander Okun. Evaluation Guidelines for Community-based Water and Sanitation Projects. [Arlington, VA]: Water and Sanitation for Health Project, 1990.

MLA (9th ed.) Citation

Roark, Philip, and Daniel Alexander Okun. Evaluation Guidelines for Community-based Water and Sanitation Projects. Water and Sanitation for Health Project, 1990.