Kalalang, I. P. Z. (2011). Kalalang-Ong level of optimism scale. University of the Philippines Diliman Extension Program in Pampanga.
Chicago Style (17th ed.) CitationKalalang, Irish Pauline Z. Kalalang-Ong Level of Optimism Scale. Pampanga: University of the Philippines Diliman Extension Program in Pampanga, 2011.
MLA (9th ed.) CitationKalalang, Irish Pauline Z. Kalalang-Ong Level of Optimism Scale. University of the Philippines Diliman Extension Program in Pampanga, 2011.
Warning: These citations may not always be 100% accurate.