Cita APA

Frendo, E., & Schofield, J. (2006). Double dealing: [upper intermediate] : self-study book : business english course. Summertown: Summertown Publishing.

Citación estilo Chicago

Frendo, Evan, and James Schofield. Double Dealing: [upper Intermediate] : Self-study Book : Business English Course. Summertown: Summertown Publishing, 2006.

Cita MLA

Frendo, Evan, and James Schofield. Double Dealing: [upper Intermediate] : Self-study Book : Business English Course. Summertown: Summertown Publishing, 2006.