Gaya APA

Barry, M., Daish, S. (2010). Practice Tests for IGCSE English as a second Language : Listening And Speaking. (Buku.2). USA: Cambridge University Press.

Gaya MLA

Barry, Marian., Daish, Sue. "Practice Tests for IGCSE English as a second Language : Listening And Speaking.". Buku.2 USA: Cambridge University Press, 2010. Text.