Cita APA (7a ed.)

Jespersen, O. (1972). Essentials of english grammar. George Allen & Unwin.

Cita Chicago Style (17a ed.)

Jespersen, Otto. Essentials of English Grammar. London: George Allen & Unwin, 1972.

Cita MLA (8a ed.)

Jespersen, Otto. Essentials of English Grammar. George Allen & Unwin, 1972.