APA (7e ed.) Bronvermelding

Cruz, R. L. (1976). A study of the value of Pitometer survey in the determination of unaccounted for water in the Manila and suburbs water supply systems [microfilm]. Photoduplication Service, University of the Philippines Library.

Chicago (17e ed.) Bronvermelding

Cruz, Ricardo L. A Study of the Value of Pitometer Survey in the Determination of Unaccounted for Water in the Manila and Suburbs Water Supply Systems [microfilm]. Quezon City: Photoduplication Service, University of the Philippines Library, 1976.

MLA (9e ed.) Bronvermelding

Cruz, Ricardo L. A Study of the Value of Pitometer Survey in the Determination of Unaccounted for Water in the Manila and Suburbs Water Supply Systems [microfilm]. Photoduplication Service, University of the Philippines Library, 1976.