Lua APA (7ú heag.)
ebrary, Inc, & Hillary, R. (2000). ISO 14001: Case studies and practical experiences. Greenleaf Pub..
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc, agus Ruth Hillary. ISO 14001: Case Studies and Practical Experiences. Sheffield: Greenleaf Pub., 2000.
Lua MLA (9ú heag.)
ebrary, Inc, agus Ruth Hillary. ISO 14001: Case Studies and Practical Experiences. Greenleaf Pub., 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.