Referensi dan Sumber Artikel

Sumber
http://www.maseteguh.com/2017/06/cara-diterima-adsense-full-approved-secara-cepat.html
https://idcloudhost.com/mengenal-apa-itu-dns-server/
https://opensource.com/article/17/4/build-your-own-name-server
https://www.verisign.com/en_US/domain-names/com-domain-names/index.xhtml?section=overview
https://www.niagahoster.co.id/blog/cara-membuat-email-dengan-domain-sendiri-di-gmail/
https://id.wikipedia.org/wiki/Optimisasi_mesin_pencari
https://www.google.com/intl/id/search/howsearchworks/
http://panduanim.com/on-page-seo/
https://www.dewaweb.com/off-page-seo/