APA (7th ed.) Citation

Perkins, M. R. (1983). Modal expressions in English / Michael R. Perkins. Pinter.

Chicago Style (17th ed.) Citation

Perkins, Michael R. Modal Expressions in English / Michael R. Perkins. London: Pinter, 1983.

MLA (9th ed.) Citation

Perkins, Michael R. Modal Expressions in English / Michael R. Perkins. Pinter, 1983.

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