Grey, Z., & Buka, D. (1990). Riders of the purple sage: Riders of the purple sage series, book 1 (Unabridged.). Recorded Books Inc..
Cita Chicago Style (17a ed.)Grey, Zane, y Donald Buka. Riders of the Purple Sage: Riders of the Purple Sage Series, Book 1. Unabridged. Prince Frederick: Recorded Books Inc., 1990.
Cita MLA (8a ed.)Grey, Zane, y Donald Buka. Riders of the Purple Sage: Riders of the Purple Sage Series, Book 1. Unabridged. Recorded Books Inc., 1990.
Precaución: Estas citas no son 100% exactas.