APA Style
Leech, G. et al (2001).
An A-Z of English Grammar & Usage 2nd Edition (2).
England:
Addison-Wesley Longman.
MLA Style
Leech, Geoffrey. et al.
"An A-Z of English Grammar & Usage 2nd Edition".
2
England:
Addison-Wesley Longman,
2001.
Bahasa Inggris.