APA (7e ed.) Bronvermelding

Haugen, D. M., & Musser, S. (2007). Is global warming a threat? Thomson/Gale/Greenhaven Press.

Chicago (17e ed.) Bronvermelding

Haugen, David M., en Susan Musser. Is Global Warming a Threat? Detroit: Thomson/Gale/Greenhaven Press, 2007.

MLA (8e ed.) Bronvermelding

Haugen, David M., en Susan Musser. Is Global Warming a Threat? Thomson/Gale/Greenhaven Press, 2007.