Style de citation APA

Nguyễn Quốc Hùng. (1998). English in Focus Level B workbook. TPHCM.

Style de citation Chicago

Nguyễn Quốc Hùng. English in Focus Level B Workbook. TPHCM, 1998.

Style de citation MLA

Nguyễn Quốc Hùng. English in Focus Level B Workbook. TPHCM, 1998.

Attention : ces citations peuvent ne pas être correctes à 100%.