Philippine Foundation for Science and Technology. (1990). Philippine science centrum explain manual. PFST.
Chicago Style (17th ed.) CitationPhilippine Foundation for Science and Technology. Philippine Science Centrum Explain Manual. Manila: PFST, 1990.
MLA (9th ed.) CitationPhilippine Foundation for Science and Technology. Philippine Science Centrum Explain Manual. PFST, 1990.
Warning: These citations may not always be 100% accurate.