Panopio, R. G. (1999). Workbook for PSI for college algebra. Learning Resource Center, University of the Philippines.
Citace podle Chicago (17th ed.)Panopio, Rolando G. Workbook for PSI for College Algebra. Diliman, Quezon City: Learning Resource Center, University of the Philippines, 1999.
Citace podle MLA (9th ed.)Panopio, Rolando G. Workbook for PSI for College Algebra. Learning Resource Center, University of the Philippines, 1999.
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