Keur, C., & Hillegass, A. (2017). IOS PROGRAMMING: THE BIG NERD RANCH GUIDE (5th ed.). Big Nerd Ranch.
Čikaški stil citiranja (17. izdanje)Keur, Christian, i Aaron Hillegass. IOS PROGRAMMING: THE BIG NERD RANCH GUIDE. 5th ed. Atlanta, GA: Big Nerd Ranch, 2017.
MLA način citiranja (9. izdanje)Keur, Christian, i Aaron Hillegass. IOS PROGRAMMING: THE BIG NERD RANCH GUIDE. 5th ed. Big Nerd Ranch, 2017.
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