1. ACT (1992). Content validity of ACT's Educational Achievement Tests. American College Testing (ACT), Iowa City, IA
2. ACT (1994). ACT assessment course placement service: Interpretive guide. ACT, Iowa City, IA
3. ACT (1997). ACT Assessment technical manual. ACT, Iowa City, IA
4. ACT (1998). Content validity of ACT's Educational Achievement Tests. American College Testing (ACT), Iowa City, IA
5. ACT (2000). Content validity evidence in support of ACT's Educational Achievement Tests: ACT's 1998–1999 National Curriculum Study. American College Testing (ACT), Iowa City, IA