Cruz, G. G. (2010). By decree. IN Landscape [column]. Manila Bulletin.
Chicago Style aipamenaCruz, Gemma Guerrero. "By Decree. IN Landscape [column]." Manila Bulletin 2010.
MLA aipamenaCruz, Gemma Guerrero. "By Decree. IN Landscape [column]." Manila Bulletin, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.