Elwell, D. (1979). Man made gemstones. John Wiley.
Chicago Edition CitationElwell, D. Man Made Gemstones. New York: John Wiley, 1979.
MLA引文Elwell, D. Man Made Gemstones. John Wiley, 1979.
警告：这些引文格式不一定是100％准确.
APA引文
Elwell, D. (1979). Man made gemstones. John Wiley.
Chicago Edition CitationElwell, D. Man Made Gemstones. New York: John Wiley, 1979.
MLA引文Elwell, D. Man Made Gemstones. John Wiley, 1979.