APA (7th ed.) Citation

Diggle, P., Liang, K., & Zeger, S. L. (1994). Analysis of longitudinal data. Clarendon.

Chicago Style (17th ed.) Citation

Diggle, Peter, Kung-Yee Liang, and Scott L. Zeger. Analysis of Longitudinal Data. Oxford: Clarendon, 1994.

MLA (9th ed.) Citation

Diggle, Peter, et al. Analysis of Longitudinal Data. Clarendon, 1994.