APA Style
Langan, John,. (2005).
College writing skills (6th ed.).
New York ::
McGraw-Hill.
Chicago Style
Langan, John,.
College writing skills.
6th ed.
New York ::
McGraw-Hill,
2005.
Text.
MLA Style
Langan, John,.
College writing skills.
6th ed.
New York ::
McGraw-Hill,
2005.
Text.
Turabian Style
Langan, John,.
College writing skills.
6th ed.
New York ::
McGraw-Hill,
2005.
Print.