(1923). The World almanac and book of facts. Press Pub. Co.
Chicago-Zitierstil (17. Ausg.)The World Almanac and Book of Facts. New York: Press Pub. Co, 1923.
MLA-Zitierstil (8. Ausg.)The World Almanac and Book of Facts. Press Pub. Co, 1923.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.