Ople, S. V. (2022). The remarkable life of Blas F. Ople. Philippines Graphic.
Chicago Style aipamenaOple, Susan V. "The Remarkable Life of Blas F. Ople." Philippines Graphic 2022.
MLA aipamenaOple, Susan V. "The Remarkable Life of Blas F. Ople." Philippines Graphic, 2022.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.