APA (7th ed.) Citation

Mackintosh, J. P. (1977). British prime ministers in the twentieth century. St. Martin's Press.

Chicago Style (17th ed.) Citation

Mackintosh, John Pitcairn. British Prime Ministers in the Twentieth Century. New York: St. Martin's Press, 1977.

MLA (9th ed.) Citation

Mackintosh, John Pitcairn. British Prime Ministers in the Twentieth Century. St. Martin's Press, 1977.