APA (7th ed.) Citation

Firschein, O., & Summit, R. K. (1976). On-Line Reference Retrieval in a Public Library.

Chicago Style (17th ed.) Citation

Firschein, O., and R. K. Summit. On-Line Reference Retrieval in a Public Library. 1976.

MLA (9th ed.) Citation

Firschein, O., and R. K. Summit. On-Line Reference Retrieval in a Public Library. 1976.

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