APA

Clarke R., Hindley Geoffrey, . (1975). The challenge of the primitives. New York: McGraw-Hill.

Chicago

Clarke Robin, Hindley Geoffrey, . 1975. The challenge of the primitives. New York: McGraw-Hill.

Harvard

Clarke R., Hindley Geoffrey, . (1975). The challenge of the primitives. New York: McGraw-Hill.

MLA

Clarke Robin, Hindley Geoffrey, . The challenge of the primitives. New York: McGraw-Hill. 1975.