Cita APA (7th ed.)

Kallir, A. (1961). Sign and design: The psychogenetic source of the alphabet. James Clarke.

Cita Chicago (17th ed.)

Kallir, Alfred. Sign and Design: The Psychogenetic Source of the Alphabet. Londres: James Clarke, 1961.

Cita MLA (9th ed.)

Kallir, Alfred. Sign and Design: The Psychogenetic Source of the Alphabet. James Clarke, 1961.