APA (7th ed.) Zitazioa

Longan, J. (2017). College Writing Skills with Readings (7th ed.). McGraw Hill.

Chicago Style (17th ed.) Zitazioa

Longan, John. College Writing Skills with Readings. 7th ed. Chennai: McGraw Hill, 2017.

MLA (9th ed.) Zitazioa

Longan, John. College Writing Skills with Readings. 7th ed. McGraw Hill, 2017.