APA (7th ed.) Citation

HORNBY, A. S. (1999). A guide to patterns and usage ..

Chicago Style (17th ed.) Citation

HORNBY, A. S. A Guide to Patterns and Usage .. 1999.

MLA (8th ed.) Citation

HORNBY, A. S. A Guide to Patterns and Usage .. 1999.

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