Citazione APA

Christensen, H. T., & Johnsen, K. P. (1971). Marriage and the family (3rd. ed.). Ronald Press.

Stile di citazione Chicago

Christensen, Harold T., e Kathryn P. Johnsen. Marriage and the Family. 3rd. ed. New York: Ronald Press, 1971.

Citazione MLA

Christensen, Harold T., e Kathryn P. Johnsen. Marriage and the Family. 3rd. ed. Ronald Press, 1971.