APA

Grenville J. A. S. 1., .A history of the world in the twentieth century. Cambridge: Belknas Press of Harvard University Press.

Chicago

Grenville John Asley Soames 1928, .A history of the world in the twentieth century. Cambridge: Belknas Press of Harvard University Press.

Harvard

Grenville J. A. S. 1., .A history of the world in the twentieth century. Cambridge: Belknas Press of Harvard University Press.

MLA

Grenville John Asley Soames 1928, .Cambridge: Belknas Press of Harvard University Press. .