Cita APA (7th ed.)

Shaw, G. B. (1939). Back to Methuselah: A metabiological pentateuch. Penguin Books.

Cita Chicago (17th ed.)

Shaw, George Bernard. Back to Methuselah: A Metabiological Pentateuch. Harmondsworth: Penguin Books, 1939.

Cita MLA (9th ed.)

Shaw, George Bernard. Back to Methuselah: A Metabiological Pentateuch. Penguin Books, 1939.