APA Style

Harris, Michael. (). Challenges Students Book 1 (Class CD 3) . : Longman.

Chicago Style

Harris, Michael. Challenges Students Book 1 (Class CD 3). : Longman, . .

MLA Style

Harris, Michael. Challenges Students Book 1 (Class CD 3). : Longman, . .

Turabian Style

Harris, Michael. Challenges Students Book 1 (Class CD 3). : Longman, . .