APA način citiranja (7. izdanje)
Sabri, E. H., Gupta, A. P., & Beitler, M. A. (2007). Purchase order management best practices: Process, technology, and change management. J. Ross Pub..
Čikaški stil citiranja (17. izdanje)
Sabri, Ehap H., Arun P. Gupta, i Michael A. Beitler. Purchase Order Management Best Practices: Process, Technology, and Change Management. Ft. Lauderdale, Fla.: J. Ross Pub., 2007.
MLA način citiranja (9. izdanje)
Sabri, Ehap H., et al. Purchase Order Management Best Practices: Process, Technology, and Change Management. J. Ross Pub., 2007.
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