Cita APA (7th ed.)
Langan, J. (2010). College writing skills with readings (8th ed.). McGraw-Hil.
Cita Chicago (17th ed.)
Langan, John. College Writing Skills with Readings. 8th ed. New York: McGraw-Hil, 2010.
Cita MLA (9th ed.)
Langan, John. College Writing Skills with Readings. 8th ed. McGraw-Hil, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.