Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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