Contact Us
SIGMA Assessment Systems
P.O. Box 610757
Port Huron, Michigan
USA 48061-0757
Phone: 1.800.265.1285
Fax: 1.800.361.9411
Research Psychologists Press
P.O. Box 3292, Station B
London, Ontario
Canada N6A 4K3
Phone: 1.800.401.4480
Fax: 1.800.361.9411