- http://www.qrcode.com/en/history/
- https://ms.wikipedia.org/wiki/Kod_QR
- https://id.wikipedia.org/wiki/Kode_QR
- http://www.bekaskaki.com/2015/04/definisi-dan-pengertian-qr-code.html
- https://www.qrstuff.com/
- https://www.the-qrcode-generator.com/
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- http://www.qr-code-generator.com/
- http://goqr.me/
- https://www.qrcode-monkey.com/
- https://www.shopify.com/pos/qr-code-generator
- https://id.wikipedia.org/wiki/Kode_QR