Ryden, H. (1970). Americans last wild horses. Dutton.
Cita Chicago (17th ed.)Ryden, Hope. Americans Last Wild Horses. New York: Dutton, 1970.
Cita MLA (9th ed.)Ryden, Hope. Americans Last Wild Horses. Dutton, 1970.
Atenció: Aquestes cites poden no estar 100% correctes.