Coe, N., Rycroft, R., & Ernest, P. (1996). Writing skills: A problem solving approach for upper intermediate and more advanced students ([[1st published, 15th printing].). Cambridge, United Kingdom: Cambridge University Press.

Coe, Norman, Robin Rycroft, and Pauline Ernest. Writing Skills: A Problem Solving Approach for Upper Intermediate and More Advanced Students. [[1st published, 15th printing]. Cambridge, United Kingdom: Cambridge University Press, 1996.

Coe, Norman, Robin Rycroft, and Pauline Ernest. Writing Skills: A Problem Solving Approach for Upper Intermediate and More Advanced Students. [[1st published, 15th printing]. Cambridge, United Kingdom: Cambridge University Press, 1996.