Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.

APA Citation Edition Citation

Anderson, B. W. (1985). Gem testing (9th edition 1980, reprinted 1980, 19882, 1985.). Butterworths.

Chicago Citation Edition Citation

Anderson, B. W. Gem Testing. 9th edition 1980, reprinted 1980, 19882, 1985. London ; Boston: Butterworths, 1985.

MLA Citation Edition Citation

Anderson, B. W. Gem Testing. 9th edition 1980, reprinted 1980, 19882, 1985. Butterworths, 1985.