Gaya APA

Kuhre, W, L. (1995). ISO 14001 CERTIFICATION Environmental Management Systems : An Pratical Guide for Preparing Effective Envinmrntal management Systems . : PTR PH.

Gaya MLA

Kuhre, W., Lee. "ISO 14001 CERTIFICATION Environmental Management Systems : An Pratical Guide for Preparing Effective Envinmrntal management Systems". : PTR PH, 1995. Text.