Pitt, W. B., & Kraft, D. H. (1975). Buy or copy? A Library Operations Research Model.
Chicago Style (17th ed.) CitationPitt, William Bruce, and Donald H. Kraft. Buy or Copy? A Library Operations Research Model. 1975.
MLA (9th ed.) CitationPitt, William Bruce, and Donald H. Kraft. Buy or Copy? A Library Operations Research Model. 1975.
Warning: These citations may not always be 100% accurate.