Grey, Z., & Buka, D. (1990). Riders of the purple sage: Riders of the purple sage series, book 1 (Unabridged.). Recorded Books Inc..
Style de citation Chicago (17e éd.)Grey, Zane, et Donald Buka. Riders of the Purple Sage: Riders of the Purple Sage Series, Book 1. Unabridged. Prince Frederick: Recorded Books Inc., 1990.
Style de citation MLA (8e éd.)Grey, Zane, et Donald Buka. Riders of the Purple Sage: Riders of the Purple Sage Series, Book 1. Unabridged. Recorded Books Inc., 1990.
Attention : ces citations peuvent ne pas être correctes à 100%.