Cita APA (7th ed.)

Cruz, C. P. (1976). A critical study of the role of oxygen in the environmental factors of stream self-purification [microform]. Photoduplication Service, University of the Philippines Library.

Cita Chicago (17th ed.)

Cruz, Conrado P. A Critical Study of the Role of Oxygen in the Environmental Factors of Stream Self-purification [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1976.

Cita MLA (9th ed.)

Cruz, Conrado P. A Critical Study of the Role of Oxygen in the Environmental Factors of Stream Self-purification [microform]. Photoduplication Service, University of the Philippines Library, 1976.