Reongrudee Naranunn. 1998. A exploratory study of portfolio assessment in an EFL context. Bangkok:Chulalongkorn University;
Reongrudee Naranunn. (1998) A exploratory study of portfolio assessment in an EFL context (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.
Reongrudee Naranunn. A exploratory study of portfolio assessment in an EFL context. Bangkok:Chulalongkorn University, 1998.
Reongrudee Naranunn. (1998) A exploratory study of portfolio assessment in an EFL context (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.