Simpson, B. (1966). Rocks and Minerals. Pergamon Press.
Cita Chicago (17th ed.)Simpson, Brian. Rocks and Minerals. Oxford: Pergamon Press, 1966.
Cita MLA (9th ed.)Simpson, Brian. Rocks and Minerals. Pergamon Press, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.