De Boer, J. J. (1968). Building better English: Text and grammar handbook (Torch ed.). Harper and Row.
Citazione stile Chigago Style (17a edizione)De Boer, John J. Building Better English: Text and Grammar Handbook. Torch ed. New York: Harper and Row, 1968.
Citatione MLA (9a ed.)De Boer, John J. Building Better English: Text and Grammar Handbook. Torch ed. Harper and Row, 1968.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.