Cita APA (7th ed.)

Walling, W. E. (1912). A survey of the world-wide revolutionary movement. New York: The MacMillan Company.

Cita Chicago (17th ed.)

Walling, William English. A Survey of the World-wide Revolutionary Movement. New York: The MacMillan Company, 1912.

Cita MLA (8th ed.)

Walling, William English. A Survey of the World-wide Revolutionary Movement. New York: The MacMillan Company, 1912.