APA (7 वां संस्करण) प्रशस्ति पत्र
Hackett, M., Statham, G., & Bowsher, M. (2016). The Aqua Group guide to procurement, tendering and contract administration (Second edition.). Wiley Blackwell.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Hackett, Mark, Gary Statham, और Michael Bowsher. The Aqua Group Guide to Procurement, Tendering and Contract Administration. Second edition. Chichester, England: Wiley Blackwell, 2016.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Hackett, Mark, et al. The Aqua Group Guide to Procurement, Tendering and Contract Administration. Second edition. Wiley Blackwell, 2016.
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