APA (7e ed.) Bronvermelding

Johnson, V. E. (1986). Intervention: How to help someone who doesn't want help: a step-bystep guide for families and friends of chemically dependent persons. Johnson Institute Books.

Chicago (17e ed.) Bronvermelding

Johnson, Vernon E. Intervention: How to Help Someone Who Doesn't Want Help: A Step-bystep Guide for Families and Friends of Chemically Dependent Persons. Johnson Institute Books, 1986.

MLA (9e ed.) Bronvermelding

Johnson, Vernon E. Intervention: How to Help Someone Who Doesn't Want Help: A Step-bystep Guide for Families and Friends of Chemically Dependent Persons. Johnson Institute Books, 1986.