Cita APA (7a ed.)

Ridley, E. (2018). Once upon a duke: 12 dukes of christmas, #1. Erica Ridley.

Cita Chicago Style (17a ed.)

Ridley, Erica. Once upon a Duke: 12 Dukes of Christmas, #1. Oklahoma City: Erica Ridley, 2018.

Cita MLA (8a ed.)

Ridley, Erica. Once upon a Duke: 12 Dukes of Christmas, #1. Erica Ridley, 2018.

Precaución: Estas citas no son 100% exactas.