Puchta, H., Stranks, J., & Jones, P. L. (2018). Think C1: Student's book 5. New York: Cambridge University Press.
Dyfyniad Arddull ChicagoPuchta, Herbert, Jeff Stranks, và Peter Lewis Jones. Think C1: Student's Book 5. New York: Cambridge University Press, 2018.
Dyfyniad MLAPuchta, Herbert, Jeff Stranks, và Peter Lewis Jones. Think C1: Student's Book 5. New York: Cambridge University Press, 2018.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.