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https://www.academia.edu/attachments/43522498/download_file?st=MTU10TAyNjY1NSw5NS43Ni4wLjE3Mw%3Ds-spl

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www.markmedia.ro

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2017 Oil and Gas Trends: http://www.strategyand.pwc.com/perspectives/2017-oil-gas-trends

Oil and Gas Trends 2018-19: https://www.strategyand.pwc.com/trend/2018-oil-gas

Leading oil and gas companies worldwide based on market capitalization as of 2018: https://www.statista.com/statistics/272709/top-10-oil-and-gas-companies-worldwide-based-on-market-value/ 

http://www.energydigital.com/utilities/top-10-oil-and-gas-companies-world 

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https://www.slideshare.net/OilandGasIQ/ogiq-sponsorship-pack-2014

Google, Atelierul digital: https://learndigital.withgoogle.com/atelieruldigital 

Google Analytics Academy: https://analytics.google.com/analytics/academy/ 

Google Analytics, tutoriale video: https://www.youtube.com/user/googleanalytics/playlists 

Google Academy for Ads: https://landing.google.com/academyforads 

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