Cita APA (7th ed.)
ETTER, J., & PERNEGER, T. (1999). A COMPARISON OF TWO MEASURES OF STAGE OF CHANGE FOR SMOKING CESSATION.
Cita Chicago (17th ed.)
ETTER, J.F, i T.V PERNEGER. A COMPARISON OF TWO MEASURES OF STAGE OF CHANGE FOR SMOKING CESSATION. 1999.
Cita MLA (9th ed.)
ETTER, J.F, i T.V PERNEGER. A COMPARISON OF TWO MEASURES OF STAGE OF CHANGE FOR SMOKING CESSATION. 1999.
Atenció: Aquestes cites poden no estar 100% correctes.