Cita APA

Allen, B., Pederson, L. L., & Leonard, E. H. (1998). Effectiveness of physicians-in-training counseling for smoking cessation in African Americans. National Medical Association.

Chicago Style Citation

Allen, B., L. L. Pederson, i E. H. Leonard. Effectiveness of Physicians-in-training Counseling for Smoking Cessation in African Americans. National Medical Association, 1998.

Cita MLA

Allen, B., L. L. Pederson, i E. H. Leonard. Effectiveness of Physicians-in-training Counseling for Smoking Cessation in African Americans. National Medical Association, 1998.