Cita APA (7a ed.)

Humboldt, W. v., & Buck, G. C. (1972). Linguistic variability & intellectual development. University of Pennsylvania Press.

Cita Chicago Style (17a ed.)

Humboldt, Wilhelm von, y George C. Buck. Linguistic Variability & Intellectual Development. Philadelphia: University of Pennsylvania Press, 1972.

Cita MLA (9a ed.)

Humboldt, Wilhelm von, y George C. Buck. Linguistic Variability & Intellectual Development. University of Pennsylvania Press, 1972.