Gaya APA
Student study guide. (1997).
New Jersey:
Prentice Hall.
Gaya Chicago
Student study guide.
.
New Jersey:
Prentice Hall,
1997.
Text.
Gaya MLA
Student study guide.
.
New Jersey:
Prentice Hall,
1997.
Text.
Gaya Turabian
Student study guide.
New Jersey:
Prentice Hall,
1997.
Print.