APA način citiranja

Hiep, D. T. H. An Investigation into Prepositions in Textbooks of English 10, 11, 12 at High Schools in Vietnam.

Čikaški stil citiranja

Hiep, Dang Thi Hong. An Investigation Into Prepositions in Textbooks of English 10, 11, 12 At High Schools in Vietnam.

MLA način citiranja

Hiep, Dang Thi Hong. An Investigation Into Prepositions in Textbooks of English 10, 11, 12 At High Schools in Vietnam.