Merkoša sitáhtat
APA-čujuhus (7. p.)
(2014). Safety management for utilities (Seventh edition.). American Water Works Association.
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Chicago-čujuhus (17. p.)
Safety Management for Utilities. Seventh edition. Denver, Colorado: American Water Works Association, 2014.
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MLA-čujuhus (9. p.)
Safety Management for Utilities. Seventh edition. American Water Works Association, 2014.
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