APA (7th ed.) Citation

Reis, H. T., & Sprecher, S. (2009). Encyclopedia of human relationships. Sage.

Chicago Style (17th ed.) Citation

Reis, Harry T., and Susan Sprecher. Encyclopedia of Human Relationships. Thousand Oaks, California [etc.]: Sage, 2009.

MLA (9th ed.) Citation

Reis, Harry T., and Susan Sprecher. Encyclopedia of Human Relationships. Sage, 2009.

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