David, C. C., & Inocencio, A. B. (1998). Understanding household demand for water: The Metro Manila case. Economy and Environment Program for Southeast Asia.
Chicago-viite (17. p.)David, Cristina C., ja Arlene B. Inocencio. Understanding Household Demand for Water: The Metro Manila Case. Singapore: Economy and Environment Program for Southeast Asia, 1998.
MLA-viite (9. p.)David, Cristina C., ja Arlene B. Inocencio. Understanding Household Demand for Water: The Metro Manila Case. Economy and Environment Program for Southeast Asia, 1998.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.