Napier, R. (2012). Pushing the limits with iOS 5 Programming: Advanced application development for apple iPONE, iPad and iPod Touch. Wiley.
Chicago-tyylinen lähdeviittausNapier, Rob. Pushing the Limits with IOS 5 Programming: Advanced Application Development for Apple IPONE, IPad and IPod Touch. Sussex: Wiley, 2012.
MLA-viiteNapier, Rob. Pushing the Limits with IOS 5 Programming: Advanced Application Development for Apple IPONE, IPad and IPod Touch. Wiley, 2012.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.