Cita APA (7th ed.)

Langan, J. (2012). English skills with readings (8th ed.). McGraw-Hill Higher Education.

Cita Chicago (17th ed.)

Langan, John. English Skills with Readings. 8th ed. New York: McGraw-Hill Higher Education, 2012.

Cita MLA (8th ed.)

Langan, John. English Skills with Readings. 8th ed. McGraw-Hill Higher Education, 2012.