APA (7th ed.) Citation

Payumo, R. R. (1993). Philippines yesterday today and tomorrow. s.n.

Chicago Style (17th ed.) Citation

Payumo, Ricardo R. Philippines Yesterday Today and Tomorrow. [S.l: s.n, 1993.

MLA (9th ed.) Citation

Payumo, Ricardo R. Philippines Yesterday Today and Tomorrow. s.n, 1993.