APA Citation

 Mascull, B. (2006).  Market leader: Upper intermediate business english Teacher''s book.  Longmans.

Chicago Style Citation

 Mascull, Bill.  Market Leader: Upper Intermediate Business English Teacher''s Book.  Longmans, 2006.

MLA Citation

 Mascull, Bill.  Market Leader: Upper Intermediate Business English Teacher''s Book.  Longmans, 2006.

Warning: These citations may not always be 100% accurate.