Cita APA (7th ed.)
Perkinson, R. R. (1997). Chemical dependency counseling: A pratical guide. Sage.
Cita Chicago (17th ed.)
Perkinson, Robert R. Chemical Dependency Counseling: A Pratical Guide. California: Sage, 1997.
Cita MLA (9th ed.)
Perkinson, Robert R. Chemical Dependency Counseling: A Pratical Guide. Sage, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.