Tohutoro APA (7th ed.)
Roberts, W. E. (1953). Gustavus Adolphus: A history of Sweden. Longmans, Green.
Tohutoru Kātū Chicago (17th ed.)
Roberts, William Edward. Gustavus Adolphus: A History of Sweden. London: Longmans, Green, 1953.
Tohutoro MLA (9th ed.)
Roberts, William Edward. Gustavus Adolphus: A History of Sweden. Longmans, Green, 1953.
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