Cita APA (7th ed.)
Langan, J. (2002). English skills with reading (5th ed.). McGrawHill.
Cita Chicago (17th ed.)
Langan, Jhon. English Skills with Reading. 5th ed. New York: McGrawHill, 2002.
Cita MLA (9th ed.)
Langan, Jhon. English Skills with Reading. 5th ed. McGrawHill, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.