Gaya APA
Cook, D, C., Kirk, W, L. (2015).
Minerals and gemstones : 300 of the Earth's Natural Treasures .
London:
Amber Books.
Gaya MLA
Cook, David, C.., Kirk, Wendy, L..
"Minerals and gemstones : 300 of the Earth's Natural Treasures".
London:
Amber Books,
2015.
Text.