Cita APA (7th ed.)

Johnson, C. (2006). Market leader: Upper intermediate business English test file (2a. ed.). Pearson Education Limited.

Cita Chicago (17th ed.)

Johnson, Christine. Market Leader: Upper Intermediate Business English Test File. 2a. ed. Essex: Pearson Education Limited, 2006.

Cita MLA (9th ed.)

Johnson, Christine. Market Leader: Upper Intermediate Business English Test File. 2a. ed. Pearson Education Limited, 2006.