Cita APA (7a ed.)

Johnston, J., & McGovern, K. (1993). The old jest. Penguin Books.

Cita Chicago Style (17a ed.)

Johnston, Jennifer, y Kieran McGovern. The Old Jest. London: Penguin Books, 1993.

Cita MLA (9a ed.)

Johnston, Jennifer, y Kieran McGovern. The Old Jest. Penguin Books, 1993.