Weil, T. E. (1975). Area handbook for Mexico (2d ed.). U.S. Government Printing Office.
Cita Chicago (17th ed.)Weil, Thomas E. Area Handbook for Mexico. 2d ed. Washington, D.C: U.S. Government Printing Office, 1975.
Cita MLA (9th ed.)Weil, Thomas E. Area Handbook for Mexico. 2d ed. U.S. Government Printing Office, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.