Nossin, J. J. Data collection for development planning. Training Division, Institute of Environmental Planning, U.P.
Chicago-referens (17:e uppl.)Nossin, Jan J. Data Collection for Development Planning. Diliman, Quezon City: Training Division, Institute of Environmental Planning, U.P.
MLA-referens (9:e uppl.)Nossin, Jan J. Data Collection for Development Planning. Training Division, Institute of Environmental Planning, U.P.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.