APA Style

Williams, M. et al (2011). The TKT (Teaching Knowledge Test) Course: Modules 1, 2 and 3 (2nd ed.). Cambridge: Cambridge University Press.

MLA Style

Williams, Melanie. et al. "The TKT (Teaching Knowledge Test) Course: Modules 1, 2 and 3". 2nd ed. Cambridge: Cambridge University Press, 2011. Text.