Cita APA (7th ed.)

Langan, J. (2002). English skills with readings (5th ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Langan, John. English Skills with Readings. 5th ed. Boston: McGraw-Hill, 2002.

Cita MLA (8th ed.)

Langan, John. English Skills with Readings. 5th ed. McGraw-Hill, 2002.