APA

Ehrman M. E., . (1966). The meanings of the modals in present-day American English. The Hague: Mouton.

Chicago

Ehrman Madeline Elizabeth, . 1966. The meanings of the modals in present-day American English. The Hague: Mouton.

Harvard

Ehrman M. E., . (1966). The meanings of the modals in present-day American English. The Hague: Mouton.

MLA

Ehrman Madeline Elizabeth, . The meanings of the modals in present-day American English. The Hague: Mouton. 1966.