Dyfyniad APA

Thomas, S., Paschall, M. J., Grube, J. W., Cannon, C., & Treffers, R. (2012). Underage alcohol policies across 50 California cities: An assessment of best practices. BioMed Central.

Dyfyniad Arddull Chicago

Thomas, Sue, Mallie J. Paschall, Joel W. Grube, Carol Cannon, and Ryan Treffers. Underage Alcohol Policies Across 50 California Cities: An Assessment of Best Practices. BioMed Central, 2012.

Dyfyniad MLA

Thomas, Sue, et al. Underage Alcohol Policies Across 50 California Cities: An Assessment of Best Practices. BioMed Central, 2012.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.