Gaya APA

Novotny, T, E. et al (2009). Cigarettes Butts and the Case for an Environmental Policy on Hazardous Cigarette Waste . : www.mdpi.com/journal/ijerph.

Gaya MLA

Novotny, Thomas, E.. et al. "Cigarettes Butts and the Case for an Environmental Policy on Hazardous Cigarette Waste". : www.mdpi.com/journal/ijerph, 2009. e-journal.