Villablanca, R. E. (1976). Suggested test items for elementary school science IV developed by the University of the Philippines Science Education Center.
Chicago-referens (17:e uppl.)Villablanca, Rolando Enerez. Suggested Test Items for Elementary School Science IV Developed by the University of the Philippines Science Education Center. 1976.
MLA-referens (9:e uppl.)Villablanca, Rolando Enerez. Suggested Test Items for Elementary School Science IV Developed by the University of the Philippines Science Education Center. 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.