Langbein, L., & Lichtman, A. (1978). Ecological inference. Sage.
Čikaški stil citiranjaLangbein, Laura, i Allan Lichtman. Ecological Inference. California: Sage, 1978.
MLA način citiranjaLangbein, Laura, i Allan Lichtman. Ecological Inference. Sage, 1978.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.