APA (7th ed.) Citation

Diringer, D. (1968). The Alphabet. A Key to the History of Mankind. Third Edition completely revised with the collaboration of Reinhold Regensburger. Volume I; Volume II.

Chicago Style (17th ed.) Citation

Diringer, David. The Alphabet. A Key to the History of Mankind. Third Edition Completely Revised with the Collaboration of Reinhold Regensburger. Volume I; Volume II. London, 1968.

MLA (8th ed.) Citation

Diringer, David. The Alphabet. A Key to the History of Mankind. Third Edition Completely Revised with the Collaboration of Reinhold Regensburger. Volume I; Volume II. 1968.