APA

Bruce J., Lloyd C. B., Leonard A., Engle P. L. & Duffy N. (1995). Families in focus. New York: The Population Council.

Chicago

Bruce Judith, Lloyd Cynthia B, Leonard Ann, Engle Patrice L and Duffy Niew. 1995. Families in focus. New York: The Population Council.

Harvard

Bruce J., Lloyd C. B., Leonard A., Engle P. L. and Duffy N. (1995). Families in focus. New York: The Population Council.

MLA

Bruce Judith, Lloyd Cynthia B, Leonard Ann, Engle Patrice L and Duffy Niew. Families in focus. New York: The Population Council. 1995.