English Teaching Division. (1971). Carl Sandburg: His life, his poems, his land. United States Information Agency.
Citace podle Chicago (17th ed.)English Teaching Division. Carl Sandburg: His Life, His Poems, His Land. Washington, D.C: United States Information Agency, 1971.
Citace podle MLA (9th ed.)English Teaching Division. Carl Sandburg: His Life, His Poems, His Land. United States Information Agency, 1971.
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