MLA

Smith, Graham M, et al. Mixed Effects Models and Extensions In Ecology with R. Springer New York, 2009.

APA

Smith, G. M, Saveliev, A. A, Zuur, A. F, Ieno, E. N, & Walker, N. (2009). Mixed effects models and extensions in ecology with R. Springer New York.

Chicago

Smith, Graham M., Anatoly A Saveliev, Alain F Zuur, Elena N Ieno, and Neil Walker. Mixed Effects Models and Extensions In Ecology with R. : Springer New York, 2009.