University of the Philippines Research Organization for Better Education. (1990). Educational research: Problem conceptualization and research designs. UPROBE.
Chicago-Zitierstil (17. Ausg.)University of the Philippines Research Organization for Better Education. Educational Research: Problem Conceptualization and Research Designs. Quezon City: UPROBE, 1990.
MLA-Zitierstil (9. Ausg.)University of the Philippines Research Organization for Better Education. Educational Research: Problem Conceptualization and Research Designs. UPROBE, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.