Wanijda Areeratchakul. 1999. Opinions of educational administrators, teachers, parents and students in Nontaburi province on the expansion of basic education at secondary schools. Faculty of Graduate Studies, Mahidol University;

Wanijda Areeratchakul. Opinions of educational administrators, teachers, parents and students in Nontaburi province on the expansion of basic education at secondary schools. . Bangkok:Mahidol University, 1999.

Wanijda Areeratchakul. (1999) Opinions of educational administrators, teachers, parents and students in Nontaburi province on the expansion of basic education at secondary schools . Mahidol University/Bangkok.