APA-referens (7:e uppl.)

Dagum, L. I. (1997). Recycling towards a sustainable future. Manila Bulletin.

Chicago-referens (17:e uppl.)

Dagum, Lovelee I. "Recycling Towards a Sustainable Future." Manila Bulletin 1997.

MLA-referens (9:e uppl.)

Dagum, Lovelee I. "Recycling Towards a Sustainable Future." Manila Bulletin, 1997.