Gaya APA

Johnson, V, E. (1987). How to Use Intervention in Your Professional Practice: A Guide for Helping Professionals Who Work with Chemical Dependents and Their Families . Minneapolis: Johnson Institue Books.

Gaya MLA

Johnson, Vernon, E. "How to Use Intervention in Your Professional Practice: A Guide for Helping Professionals Who Work with Chemical Dependents and Their Families". Minneapolis: Johnson Institue Books, 1987. print.