Latent variables.

Loglinear models with latent variables by: Hagenaars, Jacques A. (書目-語言資料,印刷品)

Latent growth curve modeling by: Preacher, Kristopher J. ... [et al.] (書目-語言資料,印刷品)

Latent variable models : an introduction to factor, path, and structural analysis by: Loehlin, John C. (書目-語言資料,印刷品)