APA

Nicholls D., . (1974). Three varieties of pluralism. New York: St. Martin's Press.

Chicago

Nicholls David, . 1974. Three varieties of pluralism. New York: St. Martin's Press.

Harvard

Nicholls D., . (1974). Three varieties of pluralism. New York: St. Martin's Press.

MLA

Nicholls David, . Three varieties of pluralism. New York: St. Martin's Press. 1974.