APA (7th ed.) Citation

Jespersen O. (1969). Essentials of English grammar. George Allen & Unwin LTD.

Chicago Style (17th ed.) Citation

Jespersen O. Essentials of English Grammar. London: George Allen & Unwin LTD, 1969.

MLA (8th ed.) Citation

Jespersen O. Essentials of English Grammar. George Allen & Unwin LTD, 1969.

Warning: These citations may not always be 100% accurate.