Παραπομπή APA

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

Παραπομπή Chicago Style

Gaile, Gaury L., και Richard Morrill. Spatial Diffusion. New Delhi: Sage Publications, 1988.

Παραπομπή MLA

Gaile, Gaury L., και Richard Morrill. Spatial Diffusion. Sage Publications, 1988.