University of Chicago. Encyclopaedia Británnica. Macropaedia: Sonar - Tax Law (15a ed.).
Chicago Style aipamenaUniversity of Chicago. Encyclopaedia Británnica. Macropaedia: Sonar - Tax Law. 15a ed.
MLA aipamenaUniversity of Chicago. Encyclopaedia Británnica. Macropaedia: Sonar - Tax Law. 15a ed.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.