Cita APA (7th ed.)

Mascull, B., & Heitler, D. (2006). Market leader: Upper intermediate business English teacher's book (1a. ed.). Pearson Education Limited.

Cita Chicago (17th ed.)

Mascull, Bill, i David Heitler. Market Leader: Upper Intermediate Business English Teacher's Book. 1a. ed. Essex: Pearson Education Limited, 2006.

Cita MLA (9th ed.)

Mascull, Bill, i David Heitler. Market Leader: Upper Intermediate Business English Teacher's Book. 1a. ed. Pearson Education Limited, 2006.