Cita APA (7a ed.)
Gray, L. H. (1950). Foundations of language (Second printing.). Macmillan.
Cita Chicago Style (17a ed.)
Gray, Louis H. Foundations of Language. Second printing. New York: Macmillan, 1950.
Cita MLA (9a ed.)
Gray, Louis H. Foundations of Language. Second printing. Macmillan, 1950.
Precaución: Estas citas no son 100% exactas.