Cita APA (7th ed.)

Duncan, S. F., & Goddard, H. W. (2017). Family life education: Principles and practices for effective outreach (Third edition.). SAGE.

Cita Chicago (17th ed.)

Duncan, Stephen F., i H. Wallace Goddard. Family Life Education: Principles and Practices for Effective Outreach. Third edition. Los Angeles: SAGE, 2017.

Cita MLA (9th ed.)

Duncan, Stephen F., i H. Wallace Goddard. Family Life Education: Principles and Practices for Effective Outreach. Third edition. SAGE, 2017.