Tacio, H. D. (2017). Hard times for Philippine birds. Philippine Graphic.
Chicago Style aipamenaTacio, Henrylito D. "Hard Times for Philippine Birds." Philippine Graphic 2017.
MLA aipamenaTacio, Henrylito D. "Hard Times for Philippine Birds." Philippine Graphic, 2017.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.