APA Citation

Anderson, B. W. (1980). Gem testing (9th ed.). London: Butterworths.

Chicago Style Citation

Anderson, B. W. Gem Testing. 9th ed. London: Butterworths, 1980.

MLA Citation

Anderson, B. W. Gem Testing. 9th ed. London: Butterworths, 1980.

Warning: These citations may not always be 100% accurate.