APA

Mackintosh J. P., . (1977). British Prime Ministers in the twentieth century. London: Weidenfeld and Nicolson.

Chicago

Mackintosh John P, . 1977. British Prime Ministers in the twentieth century. London: Weidenfeld and Nicolson.

Harvard

Mackintosh J. P., . (1977). British Prime Ministers in the twentieth century. London: Weidenfeld and Nicolson.

MLA

Mackintosh John P, . British Prime Ministers in the twentieth century. London: Weidenfeld and Nicolson. 1977.