Gaya APA

Hewings,Martin, . (2007). Advanced grammar in use:a self-study reference and practice book for advanced students of english with answers (2nd.Ed). New York: Cambridge University Press.

Gaya MLA

Hewings,Martin, . "Advanced grammar in use:a self-study reference and practice book for advanced students of english with answers". 2nd.Ed New York: Cambridge University Press, 2007. Text.