Yan, G. (2015). Ave marina: Meeting the seabirds of Tubbataha. Health & Home.
Chicago Style aipamenaYan, Gregg. "Ave Marina: Meeting the Seabirds of Tubbataha." Health & Home 2015.
MLA aipamenaYan, Gregg. "Ave Marina: Meeting the Seabirds of Tubbataha." Health & Home, 2015.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.