Cita APA (7a ed.)

Hägerstrand, T., Pred, A., & Haag, G. (1973). Innovation, diffusion as a spatial process. University of Chicago Press.

Cita Chicago Style (17a ed.)

Hägerstrand, Torsten, Allan Pred, y Greta Haag. Innovation, Diffusion as a Spatial Process. Chicago [etc.]: University of Chicago Press, 1973.

Cita MLA (9a ed.)

Hägerstrand, Torsten, et al. Innovation, Diffusion as a Spatial Process. University of Chicago Press, 1973.