Langan, J. (2005). College writing skills and college writing with readings (6th ed.). New York: McGraw-Hill.
Παραπομπή Chicago StyleLangan, John. College Writing Skills and College Writing With Readings. 6th ed. New York: McGraw-Hill, 2005.
Παραπομπή MLALangan, John. College Writing Skills and College Writing With Readings. 6th ed. New York: McGraw-Hill, 2005.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.