APA (7th ed.) Citation

Zais, H. W. (1974). A Comparison of Three Online Information Retrieval Services.

Chicago Style (17th ed.) Citation

Zais, Harriet W. A Comparison of Three Online Information Retrieval Services. 1974.

MLA (9th ed.) Citation

Zais, Harriet W. A Comparison of Three Online Information Retrieval Services. 1974.

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