Gaya APA
Biber, D, , D. (2004).
Longman grammar of spoken and written English. Foreword by Randolph Quirk. .
Harlow:
Harlow Longman.
Gaya MLA
Biber, Douglas, , Dkk..
"Longman grammar of spoken and written English. Foreword by Randolph Quirk. ".
Harlow:
Harlow Longman,
2004.
Buku.