APA

Quirk R., Greenbaum S., . (1972). A grammar of contemporary English. London: Longman.

Chicago

Quirk Randolph, Greenbaum Sidney, . 1972. A grammar of contemporary English. London: Longman.

Harvard

Quirk R., Greenbaum S., . (1972). A grammar of contemporary English. London: Longman.

MLA

Quirk Randolph, Greenbaum Sidney, . A grammar of contemporary English. London: Longman. 1972.