Gaya APA

Richards, J., Long, M. (1985). Breakthrough : A Course in English Communication Practice 1 New Edition (New Ed.). Oxford: Oxford Univrsity Press.

Gaya MLA

Richards, J.C.., Long, M.N.. "Breakthrough : A Course in English Communication Practice 1 New Edition". New Ed. Oxford: Oxford Univrsity Press, 1985. Text.