Cita APA (7a ed.)

Medawar, P. B. (1972). The hope of progress. Methuen.

Cita Chicago Style (17a ed.)

Medawar, P. B. The Hope of Progress. London: Methuen, 1972.

Cita MLA (8a ed.)

Medawar, P. B. The Hope of Progress. Methuen, 1972.