American Water Works Association & ebrary, Inc. (2012). Let's talk safety 2012: 52 talks on common utility safety practices for water professionals. American Water Works Association.
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Chicago Style (17th ed.) Zitazioa
American Water Works Association eta Inc ebrary. Let's Talk Safety 2012: 52 Talks on Common Utility Safety Practices for Water Professionals. Denver: American Water Works Association, 2012.
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MLA (9th ed.) Zitazioa
American Water Works Association eta Inc ebrary. Let's Talk Safety 2012: 52 Talks on Common Utility Safety Practices for Water Professionals. American Water Works Association, 2012.
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