APA

De Ropp R. S., . (1974). Church of the Earth: the ecology of a creative community. New York: Delacorte Press.

Chicago

De Ropp Robert S, . 1974. Church of the Earth: the ecology of a creative community. New York: Delacorte Press.

Harvard

De Ropp R. S., . (1974). Church of the Earth: the ecology of a creative community. New York: Delacorte Press.

MLA

De Ropp Robert S, . Church of the Earth: the ecology of a creative community. New York: Delacorte Press. 1974.