«Persona non grata». Collins dictionary. Besøkt 23. januar 2019. «a diplomatic or consular officer who is not acceptable to the government or sovereign to whom he or she is accredited»
«Persona Non Grata». Oxford Public International Law. Besøkt 23. januar 2019. «Article 9 has proved in practice to be a key provision which enables the receiving State to protect itself against numerous forms of unacceptable activity by members of diplomatic missions and forms an important counterweight to the immunities conferred elsewhere in the Convention.»
«Persona Non Grata». Oxford Public International Law. Besøkt 23. januar 2019. «In the early years of the operation of the Vienna Convention, suspicion of spying was the most common reason for declaring a diplomatic agent persona non grata or ‘requesting his recall’—the euphemistic expression standard in diplomatic usage.»
