Collins, A. C. The story of america in pictures: With an introduction by claude g.browers (New revised edition.). New york.
Cita Chicago (17th ed.)Collins, Alan C. The Story of America in Pictures: With an Introduction by Claude G.browers. New revised edition. Garden City: New york.
Cita MLA (9th ed.)Collins, Alan C. The Story of America in Pictures: With an Introduction by Claude G.browers. New revised edition. New york.
Atenció: Aquestes cites poden no estar 100% correctes.