APA (7th ed.) Citation

Heck, R. H., & Thomas, S. L. (2008). An introduction to multilevel modeling techniques (2. rev. ed.). Psychology Press.

Chicago Style (17th ed.) Citation

Heck, Ronald H., and Scott L. Thomas. An Introduction to Multilevel Modeling Techniques. 2. rev. ed. New York: Psychology Press, 2008.

MLA (9th ed.) Citation

Heck, Ronald H., and Scott L. Thomas. An Introduction to Multilevel Modeling Techniques. 2. rev. ed. Psychology Press, 2008.