APA ציטוט

Choi, H., Spengler, J., & Perera, F. P. (2009). PAHs: Choi et al. Respond. National Institute of Environmental Health Sciences.

Citação norma Chicago

Choi, Hyunok, John Spengler, and Frederica P. Perera. PAHs: Choi Et Al. Respond. National Institute of Environmental Health Sciences, 2009.

ציטוט MLA

Choi, Hyunok, John Spengler, and Frederica P. Perera. PAHs: Choi Et Al. Respond. National Institute of Environmental Health Sciences, 2009.