Gaya APA
Longman Grammar of Spoken and Written English. (2004).
Cina:
Longman.
Gaya Chicago
Longman Grammar of Spoken and Written English.
ed.4.
Cina:
Longman,
2004.
.
Gaya MLA
Longman Grammar of Spoken and Written English.
ed.4.
Cina:
Longman,
2004.
.
Gaya Turabian
Longman Grammar of Spoken and Written English.
Cina:
Longman,
2004.
.