Cita APA (7th ed.)

Giorgi, J. (2007). Math for water treatment operators: Practice problems to prepare for water treatment operator certification exams. American Water Works Association.

Cita Chicago (17th ed.)

Giorgi, John. Math for Water Treatment Operators: Practice Problems to Prepare for Water Treatment Operator Certification Exams. Denver, Colo.: American Water Works Association, 2007.

Cita MLA (9th ed.)

Giorgi, John. Math for Water Treatment Operators: Practice Problems to Prepare for Water Treatment Operator Certification Exams. American Water Works Association, 2007.