Kornkaew Chalothorn. 1999. The effectiveness of visual aids in cross language presentations. Faculty of Humanities, Ramkamhaeng University;
Kornkaew Chalothorn. (1999) The effectiveness of visual aids in cross language presentations . Ramkamhaeng University/Bangkok.
Kornkaew Chalothorn. The effectiveness of visual aids in cross language presentations. . Bangkok:Ramkamhaeng University, 1999.
Kornkaew Chalothorn. (1999) The effectiveness of visual aids in cross language presentations . Ramkamhaeng University/Bangkok.