Cita APA (7th ed.)

Langbein, L. I., & Lichtman, A. J. (1978). Ecological inference. Sage Publications.

Cita Chicago (17th ed.)

Langbein, Laura Irwin, i Allan J. Lichtman. Ecological Inference. Beverly Hills, Calif: Sage Publications, 1978.

Cita MLA (9th ed.)

Langbein, Laura Irwin, i Allan J. Lichtman. Ecological Inference. Sage Publications, 1978.