Παραπομπή APA

Clarke, R., & Hindley, G. (1975). Challenge of the primitives. Jonathan Cape.

Παραπομπή Chicago Style

Clarke, Robin, και Geoffrey Hindley. Challenge of the Primitives. London: Jonathan Cape, 1975.

Παραπομπή MLA

Clarke, Robin, και Geoffrey Hindley. Challenge of the Primitives. Jonathan Cape, 1975.