Asay, S. F. (2015). Backflow prevention and cross-connection control: Recommended practices (Fourth edition.). American Water Works Association.
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Chicago-čujuhus (17. p.)
Asay, Stuart F. Backflow Prevention and Cross-connection Control: Recommended Practices. Fourth edition. Denver, Colorado: American Water Works Association, 2015.
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MLA-čujuhus (9. p.)
Asay, Stuart F. Backflow Prevention and Cross-connection Control: Recommended Practices. Fourth edition. American Water Works Association, 2015.
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