Cita APA (7th ed.)
ZHU, S., & ET AL. (1997). THE DEMOGRAPHICS OF HELP-SEEKING FOR SMOKING CESSATION IN CALIFORNIA AND THE ROLE OF THE CALIFORNIA SMOKERS' HELPLINE.
Cita Chicago (17th ed.)
ZHU, S.H, i ET AL. THE DEMOGRAPHICS OF HELP-SEEKING FOR SMOKING CESSATION IN CALIFORNIA AND THE ROLE OF THE CALIFORNIA SMOKERS' HELPLINE. 1997.
Cita MLA (9th ed.)
ZHU, S.H, i ET AL. THE DEMOGRAPHICS OF HELP-SEEKING FOR SMOKING CESSATION IN CALIFORNIA AND THE ROLE OF THE CALIFORNIA SMOKERS' HELPLINE. 1997.
Atenció: Aquestes cites poden no estar 100% correctes.