Cita APA (7a ed.)

Castle, A., & Castle, E. IF youth but knew! Thomas Nelson and Sons, eds.

Cita Chicago Style (17a ed.)

Castle, Agnes, y Egerton Castle. IF Youth but Knew! London: Thomas Nelson and Sons, eds.

Cita MLA (9a ed.)

Castle, Agnes, y Egerton Castle. IF Youth but Knew! Thomas Nelson and Sons, eds.