THORPE EDGAR. (1999). GENERAL KNOWLEDGE MANUAL. A H WHEELER & CO.
Chicago Style aipamenaTHORPE EDGAR. GENERAL KNOWLEDGE MANUAL. NEW DELHI: A H WHEELER & CO, 1999.
MLA aipamenaTHORPE EDGAR. GENERAL KNOWLEDGE MANUAL. A H WHEELER & CO, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.