Willets, G. (1899). Rulers of the world at home: How they look and how they live. Christian Herald.
Citace podle Chicago (17th ed.)Willets, Gilson. Rulers of the World at Home: How They Look and How They Live. New York: Christian Herald, 1899.
Citace podle MLA (9th ed.)Willets, Gilson. Rulers of the World at Home: How They Look and How They Live. Christian Herald, 1899.
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