Gaya APA
Gartside, L.. (1989).
Modern business correspondence (4th).
Jakarta:
Binarupa Aksara.
Gaya Chicago
Gartside, L..
Modern business correspondence.
4th
Jakarta:
Binarupa Aksara,
1989.
Text.
Gaya MLA
Gartside, L..
Modern business correspondence.
4th
Jakarta:
Binarupa Aksara,
1989.
Text.
Gaya Turabian
Gartside, L..
Modern business correspondence.
4th
Jakarta:
Binarupa Aksara,
1989.
Print.