GOETSCH, D. L. (2001). ISO 14000 environmental management. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)GOETSCH, David L. ISO 14000 Environmental Management. Prentice-Hall, 2001.
Lua MLA (8ú heag.)GOETSCH, David L. ISO 14000 Environmental Management. Prentice-Hall, 2001.
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