Alvarez, V. M. (1998). Zamboanga City tagged as illegal drugs outpost. Manila Times.
Chicago Style aipamenaAlvarez, Vic M. "Zamboanga City Tagged as Illegal Drugs Outpost." Manila Times 1998.
MLA aipamenaAlvarez, Vic M. "Zamboanga City Tagged as Illegal Drugs Outpost." Manila Times, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.