Sandburg, C. (1971). His life, his poems, his land. United States Information Agency.
Cita Chicago Style (17a ed.)Sandburg, Carl. His Life, His Poems, His Land. New York, Estados Unidos: United States Information Agency, 1971.
Cita MLA (9a ed.)Sandburg, Carl. His Life, His Poems, His Land. United States Information Agency, 1971.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
