APA (7th ed.) Citation

Greenaway, Hine, O'Brien, & Thornton. (1991). Global protectionism. Macmillan.

Chicago Style (17th ed.) Citation

Greenaway, Hine, O'Brien, and Thornton. Global Protectionism. London: Macmillan, 1991.

MLA (9th ed.) Citation

Greenaway, et al. Global Protectionism. Macmillan, 1991.

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