Cita APA (7a ed.)

Blalock, H. M. (1964). Causal inferences in nonexperimental research. University of North Carolina Press.

Cita Chicago Style (17a ed.)

Blalock, Hubert M. Causal Inferences in Nonexperimental Research. Chapel Hill: University of North Carolina Press, 1964.

Cita MLA (9a ed.)

Blalock, Hubert M. Causal Inferences in Nonexperimental Research. University of North Carolina Press, 1964.