APA aipamena

Katigbak, A. F. (2005). UP honors former energy secretary. Philippine Star.

Chicago Style aipamena

Katigbak, Antonio F. "UP Honors Former Energy Secretary." Philippine Star 2005.

MLA aipamena

Katigbak, Antonio F. "UP Honors Former Energy Secretary." Philippine Star, 2005.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.