Gaya APA

Hutchins, G. (1993). ISO 900 : A Comprehensive Guide to Registrasion, Audit Guidelines, and Successful Certification . USA: Oliver Wight Publications, Inc..

Gaya MLA

Hutchins, Greg. "ISO 900 : A Comprehensive Guide to Registrasion, Audit Guidelines, and Successful Certification". USA: Oliver Wight Publications, Inc., 1993. .