Cita APA (7th ed.)

Langan, J. (2008). English skills with readings (7th ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Langan, John. English Skills with Readings. 7th ed. Boston: McGraw-Hill, 2008.

Cita MLA (9th ed.)

Langan, John. English Skills with Readings. 7th ed. McGraw-Hill, 2008.