Gaya APA

Coe, N., Rycroft, R. (1983,1986). Writing Skills a problem-solving approach for upper-intermediate and more advanced students teacher's book (E-Book) . Melbourne: Cambridge University Press.

Gaya MLA

Coe, Norman., Rycroft, Robin. "Writing Skills a problem-solving approach for upper-intermediate and more advanced students teacher's book (E-Book)". Melbourne: Cambridge University Press, 1983,1986. Text.