Citazione APA

Hornby, A. S. (1971). A guide to patterns and usage in English. Oxford University Press.

Stile di citazione Chicago

Hornby, A. S. A Guide to Patterns and Usage in English. London: Oxford University Press, 1971.

Citazione MLA

Hornby, A. S. A Guide to Patterns and Usage in English. Oxford University Press, 1971.