Cita APA (7a ed.)

Perry, A., & Roukin, S. (2018). Twenty-one days (Unabridged.). Recorded Books Inc..

Cita Chicago Style (17a ed.)

Perry, Anne, y Samuel Roukin. Twenty-one Days. Unabridged. Prince Frederick: Recorded Books Inc., 2018.

Cita MLA (8a ed.)

Perry, Anne, y Samuel Roukin. Twenty-one Days. Unabridged. Recorded Books Inc., 2018.

Precaución: Estas citas no son 100% exactas.