Jespersen, O. (1964). Essentials of English grammar. University of Alabama Press.
Cita Chicago (17th ed.)Jespersen, Otto. Essentials of English Grammar. University, Ala: University of Alabama Press, 1964.
Cita MLA (9th ed.)Jespersen, Otto. Essentials of English Grammar. University of Alabama Press, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.