Cita APA (7th ed.)

Langan John. (2005). College Writing Skills With Readings (6th ed.). Mc Graw Hill.

Cita Chicago (17th ed.)

Langan John. College Writing Skills With Readings. 6th ed. New York: Mc Graw Hill, 2005.

Cita MLA (9th ed.)

Langan John. College Writing Skills With Readings. 6th ed. Mc Graw Hill, 2005.