Cita APA (7a ed.)

Palmer, H. E. (1969). The principles of language-study. Oxford University Press.

Cita Chicago Style (17a ed.)

Palmer, Harold E. The Principles of Language-study. London: Oxford University Press, 1969.

Cita MLA (9a ed.)

Palmer, Harold E. The Principles of Language-study. Oxford University Press, 1969.