APA (7th ed.) Citation

Ledgard, H. (1983). ADA®: An Introduction (Second Edition--January 1983.). Springer New York.

Chicago Style (17th ed.) Citation

Ledgard, Henry. ADA®: An Introduction. Second Edition--January 1983. New York, NY: Springer New York, 1983.

MLA (9th ed.) Citation

Ledgard, Henry. ADA®: An Introduction. Second Edition--January 1983. Springer New York, 1983.