Sandburg, C. (1971). His life, his poems, his land. United States Information Agency.
Chicagoスタイル(17版)引用形式Sandburg, Carl. His Life, His Poems, His Land. New York, Estados Unidos: United States Information Agency, 1971.
MLA(9版)引用形式Sandburg, Carl. His Life, His Poems, His Land. United States Information Agency, 1971.
警告: この引用は必ずしも正確ではありません.