APA (7th ed.) Citation

Pitt, W. B., & Kraft, D. H. (1975). Buy or copy? A Library Operations Research Model.

Chicago Style (17th ed.) Citation

Pitt, William Bruce, and Donald H. Kraft. Buy or Copy? A Library Operations Research Model. 1975.

MLA (9th ed.) Citation

Pitt, William Bruce, and Donald H. Kraft. Buy or Copy? A Library Operations Research Model. 1975.

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