Cahill, K., & Perera, R. (2011). Competitions and incentives for smoking cessation.
Cita Chicago (17th ed.)Cahill, K., i R. Perera. Competitions and Incentives for Smoking Cessation. 2011.
Cita MLA (9th ed.)Cahill, K., i R. Perera. Competitions and Incentives for Smoking Cessation. 2011.
Atenció: Aquestes cites poden no estar 100% correctes.