Cita APA (7a ed.)

Morrill, R., Gaile, G. L., & Thrall, G. I. (1988). Spatial diffusion. Sage.

Cita Chicago Style (17a ed.)

Morrill, Richard, Gary L. Gaile, y Grant Ian Thrall. Spatial Diffusion. Newbury Park: Sage, 1988.

Cita MLA (9a ed.)

Morrill, Richard, et al. Spatial Diffusion. Sage, 1988.