University of Chicago. Encyclopaedia Británnica. Macropaedia: Sonar - Tax Law (15a ed.).
Cita Chicago (17th ed.)University of Chicago. Encyclopaedia Británnica. Macropaedia: Sonar - Tax Law. 15a ed.
Cita MLA (8th ed.)University of Chicago. Encyclopaedia Británnica. Macropaedia: Sonar - Tax Law. 15a ed.
Atenció: Aquestes cites poden no estar 100% correctes.