APA

Farrell M., Rossi F. & Ceriani R. (2001). The World of English. : Longman.

Chicago

Farrell M, Rossi F and Ceriani R. 2001. The World of English. : Longman.

Harvard

Farrell M., Rossi F. and Ceriani R. (2001). The World of English. : Longman.

MLA

Farrell M, Rossi F and Ceriani R. The World of English. : Longman. 2001.