APA (7th ed.) Citation

DeLucas, M. (2014). GameMaker Game Programming with GML. Packt Publishing.

Chicago Style (17th ed.) Citation

DeLucas, Matthew. GameMaker Game Programming with GML. Olton Birmingham: Packt Publishing, 2014.

MLA (9th ed.) Citation

DeLucas, Matthew. GameMaker Game Programming with GML. Packt Publishing, 2014.

Warning: These citations may not always be 100% accurate.