APA (7th ed.) Citation

Blewitt, A. (2016). Swift Essentials (Second Edition): Discover How to Build IOS and WatchOS Applications in Swift 2 Using Xcode.

Chicago Style (17th ed.) Citation

Blewitt, Alex. Swift Essentials (Second Edition): Discover How to Build IOS and WatchOS Applications in Swift 2 Using Xcode. 2016.

MLA (9th ed.) Citation

Blewitt, Alex. Swift Essentials (Second Edition): Discover How to Build IOS and WatchOS Applications in Swift 2 Using Xcode. 2016.

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