Gaya APA

Richards, J, C., Long, M, N. (1987). Breakthrough : A Course in English Communication Practice 3 New Edition Workbook . Hong Kong: Oxford University Press.

Gaya MLA

Richards, J., C.., Long, M., N.. "Breakthrough : A Course in English Communication Practice 3 New Edition Workbook". Hong Kong: Oxford University Press, 1987. Koleksi Cetak.