Laird, C. G., & Gorrell, R. M. (1961). English as language: Backgrounds, development, usage. Harcourt.
Cita Chicago (17th ed.)Laird, Charlton Grant, i Robert M. Gorrell. English as Language: Backgrounds, Development, Usage. New York: Harcourt, 1961.
Cita MLA (9th ed.)Laird, Charlton Grant, i Robert M. Gorrell. English as Language: Backgrounds, Development, Usage. Harcourt, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.