APA Format
23722. (New York: Sterling Publishing, [sa]). Gemstones of the world. :
MLA Format
23722. Gemstones of the world. : , New York: Sterling Publishing, [sa]
Chicago Format
23722. Gemstones of the world. : , New York: Sterling Publishing, [sa]
Australian/Harvard Format
23722. New York: Sterling Publishing, [sa]. Gemstones of the world.