Παραπομπή APA

Young, R. L., Crooks, C., Elder, J. P., Kenney, E., Bal, D. G., & Johnson, M. (1991). Smoking cessation attitudes, practices, and policies among California primary care physicians.

Παραπομπή Chicago Style

Young, R. L., C. Crooks, J. P. Elder, E. Kenney, D. G. Bal, και M. Johnson. Smoking Cessation Attitudes, Practices, and Policies Among California Primary Care Physicians. 1991.

Παραπομπή MLA

Young, R. L., et al. Smoking Cessation Attitudes, Practices, and Policies Among California Primary Care Physicians. 1991.

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