Citace podle APA (7th ed.)
Langer, W. L. Western Civilization: The Struggle for Empire to Europe in the Modern World. Harper and Row : American Heritage.
Citace podle Chicago (17th ed.)
Langer, William L. Western Civilization: The Struggle for Empire to Europe in the Modern World. Nueva York, EUA: Harper and Row : American Heritage.
Citace podle MLA (9th ed.)
Langer, William L. Western Civilization: The Struggle for Empire to Europe in the Modern World. Harper and Row : American Heritage.
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