English Teaching Division. (1971). Carl Sandburg: His life, his poems, his land. United States Information Agency.
Cytowanie według stylu Chicago (wyd. 17)English Teaching Division. Carl Sandburg: His Life, His Poems, His Land. Washington, D.C: United States Information Agency, 1971.
Cytowanie według stylu MLA (wyd. 9)English Teaching Division. Carl Sandburg: His Life, His Poems, His Land. United States Information Agency, 1971.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..