APA (7th ed.) Citation
Leech, G. (1991). <An> A-Z of English Grammar and Usage (1. ed.). Nelson.
Chicago Style (17th ed.) Citation
Leech, Geoffrey. <An> A-Z of English Grammar and Usage. 1. ed. Walton-on-Thames: Nelson, 1991.
MLA (9th ed.) Citation
Leech, Geoffrey. <An> A-Z of English Grammar and Usage. 1. ed. Nelson, 1991.
Warning: These citations may not always be 100% accurate.