Gaya APA

Cox, K. et al (1974). An Introduction To The Practical Study Of Crystals Minerals and Rocks (Revised First Ed.). London: McGraw hill book company.

Gaya MLA

Cox, K.G.. et al. "An Introduction To The Practical Study Of Crystals Minerals and Rocks". Revised First Ed. London: McGraw hill book company, 1974. Text.