APA-referens (7:e uppl.)

Vergara, A. Y. (2002). The discipline of green. Philippine Daily Inquirer.

Chicago-referens (17:e uppl.)

Vergara, Alex Y. "The Discipline of Green." Philippine Daily Inquirer 2002.

MLA-referens (9:e uppl.)

Vergara, Alex Y. "The Discipline of Green." Philippine Daily Inquirer, 2002.