APA Style

LANSWORD, L, A, B, L. (2019). UNLOCK 4 Listening, Speaking & Critical Thinking Student's Book With Activation Code Inside Second Edition (2nd Edition). Cambridge (U.K): Cambridge University Press.

MLA Style

LANSWORD, Lewis, And, Brinks, Lockwood. "UNLOCK 4 Listening, Speaking & Critical Thinking Student's Book With Activation Code Inside Second Edition". 2nd Edition Cambridge (U.K): Cambridge University Press, 2019. Text.