APA

Morrill R. L., Gaile G. L. & Thrall G. I. (1988). Spatial diffusion. Newbury Park [u.a.]: Sage Publications.

Chicago

Morrill Richard L, Gaile Gary L and Thrall Grant Ian. 1988. Spatial diffusion. Newbury Park [u.a.]: Sage Publications.

Harvard

Morrill R. L., Gaile G. L. and Thrall G. I. (1988). Spatial diffusion. Newbury Park [u.a.]: Sage Publications.

MLA

Morrill Richard L, Gaile Gary L and Thrall Grant Ian. Spatial diffusion. Newbury Park [u.a.]: Sage Publications. 1988.