APA aipamena

Nafstad, P., Haheim, L., Oftedal, B., Gram, F., Holme, I., Hjermann, I., & Leren, P. (2003). Lung cancer and air pollution: A 27 year follow up of 16 209 Norwegian men. BMJ Group.

Chicago Style aipamena

Nafstad, P., L. Haheim, B. Oftedal, F. Gram, I. Holme, I. Hjermann, and P. Leren. Lung Cancer and Air Pollution: A 27 Year Follow Up of 16 209 Norwegian Men. BMJ Group, 2003.

MLA aipamena

Nafstad, P., et al. Lung Cancer and Air Pollution: A 27 Year Follow Up of 16 209 Norwegian Men. BMJ Group, 2003.