Hunt, D., Johnson, C., & Johnson, C. (1995). Environmental management systems: Principles and practice. London ; New York: McGraw-Hill Book Co..
Παραπομπή Chicago StyleHunt, David, Catherine Johnson, and Catherine Johnson. Environmental Management Systems: Principles and Practice. London ; New York: McGraw-Hill Book Co., 1995.
Παραπομπή MLAHunt, David, Catherine Johnson, and Catherine Johnson. Environmental Management Systems: Principles and Practice. London ; New York: McGraw-Hill Book Co., 1995.
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