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https://www.1-2-3.tv/uploads/files/2013_06_123tv%20Company%20Profile.pdf
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https://www.1-2-3.tv/uploads/files/Broschuere_123tv.pdf
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https://www.1-2-3.tv/uploads/files/2015_11_123tv%20Key%20Facts.pdf
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https://www.4-2-3.tv/uploads/files/150331_123tv_Ergebnis2014_Q12015.pdf
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. Accessed 27 March 2017.