Orr, M. (1957). Diamond in the sky. Permabooks.
Cita Chicago (17th ed.)Orr, Mary. Diamond in the Sky. Nueva York: Permabooks, 1957.
Cita MLA (9th ed.)Orr, Mary. Diamond in the Sky. Permabooks, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.