"Country Profile: Spain". Institute of Media and Communications Study. Diarsipkan dari versi asli tanggal 2015-02-21. Diakses tanggal 21 February 2015.
"Privacy Policy." Planeta. Retrieved on 15 May 2018. "PLANETA CORPORACIÓN, SRL, with registered address at Josefa Valcárcel, nº 42, 28027 Madrid,"
"Legal WarningDiarsipkan 2010-11-20 di Wayback Machine.." Planeta. Retrieved on 20 December 2010. "Planeta Corporación, S.R.L. is a Spanish business entity, with address at Av. Diagonal, 662-664, 08034 Barcelona, Spain,"
"Country Profile: Spain". Institute of Media and Communications Study. Diarsipkan dari versi asli tanggal 2015-02-21. Diakses tanggal 21 February 2015.
"Legal WarningDiarsipkan 2010-11-20 di Wayback Machine.." Planeta. Retrieved on 20 December 2010. "Planeta Corporación, S.R.L. is a Spanish business entity, with address at Av. Diagonal, 662-664, 08034 Barcelona, Spain,"