APA (7th ed.) Citation

Halford, W. K. (2011). Marriage and relationship education: What works and how to provide it. Guilford Press.

Chicago Style (17th ed.) Citation

Halford, W. Kim. Marriage and Relationship Education: What Works and How to Provide It. New York: Guilford Press, 2011.

MLA (9th ed.) Citation

Halford, W. Kim. Marriage and Relationship Education: What Works and How to Provide It. Guilford Press, 2011.

Warning: These citations may not always be 100% accurate.