Phạm, N. T. (2010). The impact of teacher indirect feedback on learners' writing ability in efl writing classes: Master of education. program: Principles and methods in english language education. Cần Thơ: Trường đại học Cần Thơ.
Čikaški stil citiranjaPhạm, Ngọc Thuý. The Impact of Teacher Indirect Feedback On Learners' Writing Ability in Efl Writing Classes: Master of Education. Program: Principles and Methods in English Language Education. Cần Thơ: Trường đại học Cần Thơ, 2010.
MLA način citiranjaPhạm, Ngọc Thuý. The Impact of Teacher Indirect Feedback On Learners' Writing Ability in Efl Writing Classes: Master of Education. Program: Principles and Methods in English Language Education. Cần Thơ: Trường đại học Cần Thơ, 2010.