Trích dẫn APA

Jonker, N. (1998). Further ahead: A communication skills course for business English : teacher's guide. Cambridge: Cambridge University Press.

Trích dẫn kiểu Chicago

Jonker, Niels. Further Ahead: A Communication Skills Course for Business English : Teacher's Guide. Cambridge: Cambridge University Press, 1998.

Trích dẫn MLA

Jonker, Niels. Further Ahead: A Communication Skills Course for Business English : Teacher's Guide. Cambridge: Cambridge University Press, 1998.

Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.