APA

Sargent F. O., Lusk P., Rivera J. A. & Varela M. (1991). Rural environmental planning for sustainable communities. Washington, D.C: Island Press.

Chicago

Sargent Frederic O, Lusk Paul, Rivera José A and Varela María. 1991. Rural environmental planning for sustainable communities. Washington, D.C: Island Press.

Harvard

Sargent F. O., Lusk P., Rivera J. A. and Varela M. (1991). Rural environmental planning for sustainable communities. Washington, D.C: Island Press.

MLA

Sargent Frederic O, Lusk Paul, Rivera José A and Varela María. Rural environmental planning for sustainable communities. Washington, D.C: Island Press. 1991.