Beginning iOS Game Center and Game Kit: For iPhone, iPad, and iPod touch

MLA

Richter, Kyle, Marcus Zarra, and Cynthia Kurkowski. Beginning Ios Game Center and Game Kit: For Iphone, Ipad, and Ipod Touch. Apress, 2011.

APA

Richter, K., Zarra, M., & Kurkowski, C. (2011). Beginning iOS Game Center and Game Kit: For iPhone, iPad, and iPod touch. Apress.

Chicago

Richter, Kyle, Marcus Zarra, and Cynthia Kurkowski. Beginning Ios Game Center and Game Kit: For Iphone, Ipad, and Ipod Touch. : Apress, 2011.