Citazione Stile APA (7a Edizione)

Erskine, J., & Erskine, H. j. a. (1917). Written English: A guide to the rules of composition. The Century Co.

Citazione stile Chigago Style (17a edizione)

Erskine, John, e Helen joint author Erskine. Written English: A Guide to the Rules of Composition. New York: The Century Co, 1917.

Citatione MLA (9a ed.)

Erskine, John, e Helen joint author Erskine. Written English: A Guide to the Rules of Composition. The Century Co, 1917.