Style de citation APA (7e éd.)

Palmer, F. R. (1990). Modality and the English modals. Longman.

Style de citation Chicago (17e éd.)

Palmer, Frank Robert. Modality and the English Modals. London: Longman, 1990.

Style de citation MLA (9e éd.)

Palmer, Frank Robert. Modality and the English Modals. Longman, 1990.