Cita APA (7a ed.)

Jespersen, O. (1987). Essentials of English grammar. University of Alabama Press.

Cita Chicago Style (17a ed.)

Jespersen, Otto. Essentials of English Grammar. Tuscaloosa [etc.]: University of Alabama Press, 1987.

Cita MLA (9a ed.)

Jespersen, Otto. Essentials of English Grammar. University of Alabama Press, 1987.