Cita APA (7a ed.)

Lay, E. J. S., & Lay, G. (1960). In the middle ages (Easy study ed., 1. ed., reprinted.). Macmillan.

Cita Chicago Style (17a ed.)

Lay, E. J. S., y George Lay. In the Middle Ages. Easy study ed., 1. ed., reprinted. London: Macmillan, 1960.

Cita MLA (9a ed.)

Lay, E. J. S., y George Lay. In the Middle Ages. Easy study ed., 1. ed., reprinted. Macmillan, 1960.