Παραπομπή APA

George, F. H. (1977). Cybernetics and the Environment. Paul Elek.

Παραπομπή Chicago Style

George, F. H. Cybernetics and the Environment. London: Paul Elek, 1977.

Παραπομπή MLA

George, F. H. Cybernetics and the Environment. Paul Elek, 1977.