APA (7th ed.) Citation

Sage, Kreft, I., & Leeuw, J. (1998). Introducing multilevel modeling. Sage.

Chicago Style (17th ed.) Citation

Sage, I. Kreft, and J. Leeuw. Introducing Multilevel Modeling. London: Sage, 1998.

MLA (8th ed.) Citation

Sage, et al. Introducing Multilevel Modeling. Sage, 1998.

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