APA (7th ed.) Citation

Creighton, R. H. (2013). Unity 4.x: Game development by example beginner's guide. Packt Publishing.

Chicago Style (17th ed.) Citation

Creighton, Ryan Henson. Unity 4.x: Game Development by Example Beginner's Guide. Birmingham: Packt Publishing, 2013.

MLA (9th ed.) Citation

Creighton, Ryan Henson. Unity 4.x: Game Development by Example Beginner's Guide. Packt Publishing, 2013.