APA Citation

Manckenzie, C., & Keller, H. (1954). World Braille usage: A survey of offorts towards uniformity of Braille notation. Paris: Unesco.

Chicago Style Citation

Manckenzie, Clutha, and Helen Keller. World Braille Usage: A Survey of Offorts Towards Uniformity of Braille Notation. Paris: Unesco, 1954.

MLA Citation

Manckenzie, Clutha, and Helen Keller. World Braille Usage: A Survey of Offorts Towards Uniformity of Braille Notation. Paris: Unesco, 1954.

Warning: These citations may not always be 100% accurate.