APA (7th ed.) Citation

Littell, R. C., Stroup, W. W., & Freund, R. J. (2002). SAS for linear models (4. ed.). SAS Institute Inc.

Chicago Style (17th ed.) Citation

Littell, Ramon C., Walter W. Stroup, and Rudolf Jakob Freund. SAS for Linear Models. 4. ed. Cary, N.C: SAS Institute Inc, 2002.

MLA (9th ed.) Citation

Littell, Ramon C., et al. SAS for Linear Models. 4. ed. SAS Institute Inc, 2002.