[1] Flappy Bird Icon. 2016, December 1. www.wikipedia.org
[2] Flappy Bird!. 2016, November 22. www.cplusplus.com
[3] FEH Proteus Guide. 2016, November 29. u.osu.edu
[4] Tips to be good (and not suck) at Flappy Bird. 2016, December 5. www.gamezone.com
[5] Gucci Mane | Know Your Meme 2016. 2016, December 5. www.knowyourmeme.com
[6] Flappy Bird. 2016, Novemeber 29. www.minecraftpixelarttemplates.com
[7] PREMIERRE POSTER BACKGROUND TEMPLATE. 2016, December 6. www.ronyasoft.com