Standard Book Numbering Agency. (1985). ISBN, international standard book numbering: (incorporating the guidelines for numbering software intended for sale by retailers) (6th (revised) ed.). The Agency.
Chicago Style (17th ed.) CitationStandard Book Numbering Agency. ISBN, International Standard Book Numbering: (incorporating the Guidelines for Numbering Software Intended for Sale by Retailers). 6th (revised) ed. London: The Agency, 1985.
MLA (9th ed.) CitationStandard Book Numbering Agency. ISBN, International Standard Book Numbering: (incorporating the Guidelines for Numbering Software Intended for Sale by Retailers). 6th (revised) ed. The Agency, 1985.
Warning: These citations may not always be 100% accurate.