Gaya APA
HUMMOND, Eugene R.. (1985).
Informative writing .
United States of America:
McGraw Hill.
Gaya Chicago
HUMMOND, Eugene R..
Informative writing.
United States of America:
McGraw Hill,
1985.
Text.
Gaya MLA
HUMMOND, Eugene R..
Informative writing.
United States of America:
McGraw Hill,
1985.
Text.
Gaya Turabian
HUMMOND, Eugene R..
Informative writing.
United States of America:
McGraw Hill,
1985.
Print.