Sayre, D. (1997). Inside ISO 14000: The competitive advantage of environmental management. St. Lucie Press ; Vanity Books International.
Lua i Stíl Chicago (17ú heag.)Sayre, Don. Inside ISO 14000: The Competitive Advantage of Environmental Management. Delray Beach, Fla. : New Delhi: St. Lucie Press ; Vanity Books International, 1997.
Lua MLA (8ú heag.)Sayre, Don. Inside ISO 14000: The Competitive Advantage of Environmental Management. St. Lucie Press ; Vanity Books International, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.