ITC Guidelines on Adapting Tests
International Test Commission, 2010 

URL: http://www.intestcom.org/Guidelines/Adapting+Tests.php

Further Inforamation:
Hambleton, R. K. (2005). Issues, Designs and Technical Guidelines for Adapting Tests Into Multiple Languages and Cultures. In R. K. Hambleton, P. F. Merenda and C. D. Spielberger (Eds.). Adapting Psychological and Educational Tests for Cross-Cultural Assessment. NJ: Lawrence Erlbaum.