Elwell, D. (1979). Man made gemstones. John Wiley.
Citación estilo ChicagoElwell, D. Man Made Gemstones. New York: John Wiley, 1979.
Cita MLAElwell, D. Man Made Gemstones. John Wiley, 1979.
Warning: These citations may not always be 100% accurate.
Cita APA