Παραπομπή APA

Barkans, M., & Lawrance, K. (2013). Contraband tobacco on post-secondary campuses in Ontario, Canada: Analysis of discarded cigarette butts. BioMed Central.

Παραπομπή Chicago Style

Barkans, Meagan, και Kelli-an Lawrance. Contraband Tobacco On Post-secondary Campuses in Ontario, Canada: Analysis of Discarded Cigarette Butts. BioMed Central, 2013.

Παραπομπή MLA

Barkans, Meagan, και Kelli-an Lawrance. Contraband Tobacco On Post-secondary Campuses in Ontario, Canada: Analysis of Discarded Cigarette Butts. BioMed Central, 2013.

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