Cita APA (7th ed.)
Hornby, A. S. (1971). A guide to patterns and usage in english. OUP.
Cita Chicago (17th ed.)
Hornby, A. S. A Guide to Patterns and Usage in English. Oxford: OUP, 1971.
Cita MLA (9th ed.)
Hornby, A. S. A Guide to Patterns and Usage in English. OUP, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.