(1987). Options advanced English student's book.
Trích dẫn kiểu ChicagoOptions Advanced English Student's Book. 1987.
MLA CitationOptions Advanced English Student's Book. 1987.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.
(1987). Options advanced English student's book.
Trích dẫn kiểu ChicagoOptions Advanced English Student's Book. 1987.
MLA CitationOptions Advanced English Student's Book. 1987.