Cita APA (7th ed.)

Whitby, N. (2006). Business benchmark: Pre-intermediate to intermediate preliminary (1a. ed.). Cambridge University.

Cita Chicago (17th ed.)

Whitby, Norman. Business Benchmark: Pre-intermediate to Intermediate Preliminary. 1a. ed. Cambridge: Cambridge University, 2006.

Cita MLA (9th ed.)

Whitby, Norman. Business Benchmark: Pre-intermediate to Intermediate Preliminary. 1a. ed. Cambridge University, 2006.