Gaya APA
Puja. (2000).
English social letter patterns .
Jakarta:
Harmoni.
Gaya Chicago
Puja.
English social letter patterns.
Jakarta:
Harmoni,
2000.
Text.
Gaya MLA
Puja.
English social letter patterns.
Jakarta:
Harmoni,
2000.
Text.
Gaya Turabian
Puja.
English social letter patterns.
Jakarta:
Harmoni,
2000.
Print.