Cita APA (7th ed.)

Warner, A. R. (1993). English auxiliaries: Structure and history. Cambridge University Press.

Cita Chicago (17th ed.)

Warner, Anthony R. English Auxiliaries: Structure and History. Cambridge: Cambridge University Press, 1993.

Cita MLA (9th ed.)

Warner, Anthony R. English Auxiliaries: Structure and History. Cambridge University Press, 1993.