Cita APA (7a ed.)

Hanfling, O. (1974). Cause and effect. The Open University Press.

Cita Chicago Style (17a ed.)

Hanfling, Oswald. Cause and Effect. London: The Open University Press, 1974.

Cita MLA (9a ed.)

Hanfling, Oswald. Cause and Effect. The Open University Press, 1974.