Παραπομπή σε μορφή APA (7η εκδ.)

Villablanca, R. E. (1976). Suggested test items for elementary school science IV developed by the University of the Philippines Science Education Center.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Villablanca, Rolando Enerez. Suggested Test Items for Elementary School Science IV Developed by the University of the Philippines Science Education Center. 1976.

Παραπομπή σε μορφή MLA (9th εκδ.)

Villablanca, Rolando Enerez. Suggested Test Items for Elementary School Science IV Developed by the University of the Philippines Science Education Center. 1976.