Roelofs, G. (1999). PNG The definitive guide. O'Reilly.
Chicago Style (17th ed.) CitationRoelofs, Greg. PNG The Definitive Guide. Beijing: O'Reilly, 1999.
MLA (8th ed.) CitationRoelofs, Greg. PNG The Definitive Guide. O'Reilly, 1999.
Warning: These citations may not always be 100% accurate.