Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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