Cita APA (7a ed.)

Pile, L., & Williams, A. (2003). Progress to Vantage: Developing business english skills at intermediate level : student's book. Summertown Publishing.

Cita Chicago Style (17a ed.)

Pile, Louise, y Anne Williams. Progress to Vantage: Developing Business English Skills at Intermediate Level : Student's Book. Summertown: Summertown Publishing, 2003.

Cita MLA (9a ed.)

Pile, Louise, y Anne Williams. Progress to Vantage: Developing Business English Skills at Intermediate Level : Student's Book. Summertown Publishing, 2003.