(1952). The ENCYLOPEDIA Americana: Complete in thirty volumes. Americana Corporation.
Cita Chicago (17th ed.)The ENCYLOPEDIA Americana: Complete in Thirty Volumes. Americana Corporation, 1952.
Cita MLA (9th ed.)The ENCYLOPEDIA Americana: Complete in Thirty Volumes. Americana Corporation, 1952.
Atenció: Aquestes cites poden no estar 100% correctes.