Sakorn Boondao. 1992. The effectiveness of assignments for submission in teaching and learning mathematics in distance education. , Monash University;
Sakorn Boondao. (1992) The effectiveness of assignments for submission in teaching and learning mathematics in distance education . Monash University/Monash.
Sakorn Boondao. The effectiveness of assignments for submission in teaching and learning mathematics in distance education. . Monash:Monash University, 1992.
Sakorn Boondao. (1992) The effectiveness of assignments for submission in teaching and learning mathematics in distance education . Monash University/Monash.