APA aipamena

Toynbee, A. J. The breakdowns of civilizations (7a ed.).

Chicago Style aipamena

Toynbee, Arnold J. The Breakdowns of Civilizations. 7a ed.

MLA aipamena

Toynbee, Arnold J. The Breakdowns of Civilizations. 7a ed.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.