Gaya APA
Heywood, Roger. (1987).
All about PR (1).
Singapore:
Mc Graw Hill.
Gaya Chicago
Heywood, Roger.
All about PR.
1
Singapore:
Mc Graw Hill,
1987.
Text.
Gaya MLA
Heywood, Roger.
All about PR.
1
Singapore:
Mc Graw Hill,
1987.
Text.
Gaya Turabian
Heywood, Roger.
All about PR.
1
Singapore:
Mc Graw Hill,
1987.
Print.