APA引文

Helbling, J., & Schult, V. (2004). Mangyan survival strategies. New Day.

Chicago Style (17th ed.) Citation

Helbling, Jurg, and Volker Schult. Mangyan Survival Strategies. Quezon City: New Day, 2004.

MLA引文

Helbling, Jurg, and Volker Schult. Mangyan Survival Strategies. New Day, 2004.