APA (7 ম সংস্করণ) উদ্ধৃতি
Giorgi, J. (2007). Math for water treatment operators: Practice problems to prepare for water treatment operator certification exams. American Water Works Association.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি
Giorgi, John. Math for Water Treatment Operators: Practice Problems to Prepare for Water Treatment Operator Certification Exams. Denver, Colo.: American Water Works Association, 2007.
M.L.A (9 ম সংস্করণ) উদ্ধৃতি
Giorgi, John. Math for Water Treatment Operators: Practice Problems to Prepare for Water Treatment Operator Certification Exams. American Water Works Association, 2007.
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