(1991). Langis at tubig [editoryal]. Philippine Collegian.
Chicago Style aipamena"Langis at Tubig [editoryal]." Philippine Collegian 1991.
MLA aipamena"Langis at Tubig [editoryal]." Philippine Collegian, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.