THORPE EDGAR. (1996). WHEELERS CONCISE GENERAL KNOWLEDGE DIGEST (3RD.). A H WHEELER & CO.
Cita Chicago (17th ed.)THORPE EDGAR. WHEELERS CONCISE GENERAL KNOWLEDGE DIGEST. 3RD. NEW DELHI: A H WHEELER & CO, 1996.
Cita MLA (9th ed.)THORPE EDGAR. WHEELERS CONCISE GENERAL KNOWLEDGE DIGEST. 3RD. A H WHEELER & CO, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.