Gaya APA
Swanson, C, P., Ariyadasa, K. (NULL).
The curriculum development centre of sri lanka .
Thailand::
Thailand: Unesco; 1977.
Gaya MLA
Swanson, Carl, P.., Ariyadasa, K.D..
"The curriculum development centre of sri lanka".
Thailand::
Thailand: Unesco; 1977,
NULL.
Text.