APA
Benn C., Dummett P. & Nicholas Sheard. (2004). Progress to vantage: Developing Business English Skills at Intermediate Level: Work Book with Key. Oxford: Summer Town publishing.
Chicago
Benn Colin, Dummett Paul and Nicholas Sheard. 2004. Progress to vantage: Developing Business English Skills at Intermediate Level: Work Book with Key. Oxford: Summer Town publishing.
Harvard
Benn C., Dummett P. and Nicholas Sheard. (2004). Progress to vantage: Developing Business English Skills at Intermediate Level: Work Book with Key. Oxford: Summer Town publishing.
MLA
Benn Colin, Dummett Paul and Nicholas Sheard. Progress to vantage: Developing Business English Skills at Intermediate Level: Work Book with Key. Oxford: Summer Town publishing. 2004.