Gaya APA
Alexander, L.G.. (1989).
Developing Skills .
England:
Longman.
Gaya Chicago
Alexander, L.G..
Developing Skills.
England:
Longman,
1989.
Text.
Gaya MLA
Alexander, L.G..
Developing Skills.
England:
Longman,
1989.
Text.
Gaya Turabian
Alexander, L.G..
Developing Skills.
England:
Longman,
1989.
Print.