Prachya Prachsarnpetch. 2009. Factors causing import goods classification errors. Graduate School, Chulalongkorn University;

Prachya Prachsarnpetch. Factors causing import goods classification errors. . Bangkok:Chulalongkorn University, 2009.

Prachya Prachsarnpetch. (2009) Factors causing import goods classification errors . Chulalongkorn University/Bangkok.