APA استشهاد

Sayre, D. (1997). Inside ISO 14000: The competitive advantage of environmental management. Vanity Books international.

استشهاد بنمط شيكاغو

Sayre, Don. Inside ISO 14000: The Competitive Advantage of Environmental Management. New delhi: Vanity Books international, 1997.

MLA استشهاد

Sayre, Don. Inside ISO 14000: The Competitive Advantage of Environmental Management. Vanity Books international, 1997.