Đọc thêm Chữ cái

Daniels, Peter T., and William Bright, eds. 1996. The World's Writing Systems. ISBN 0-19-507993-0.
Powell, Barry B. 1991. Homer and the Origin of the Greek Alphabet. ISBN 978-0-521-58907-9 | ISBN 0-521-58907-X.
Robinson A. 2003, "The Origins of writing" in David Crowely and Paul Heyer 'Communication in History: Technology, Culture, Society' (fourth edition) Allyn and Bacon Boston pp 34–40

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