Cita APA (7th ed.)
Velleman, R. Counselling for alcohol problems (2nd ed.). Sage.
Cita Chicago (17th ed.)
Velleman, Richard. Counselling for Alcohol Problems. 2nd ed. London: Sage.
Cita MLA (9th ed.)
Velleman, Richard. Counselling for Alcohol Problems. 2nd ed. Sage.
Atenció: Aquestes cites poden no estar 100% correctes.