<ref>* {{CitLib |aut=Inge Mennen |tit=Power and Status in the Roman Empire, AD 193-284 |ann=2011-04-26 |isbn=978-90-04-20359-4 |url=https://books.google.hu/books?id=uZqQjkb07g8C&pg=PA218&lpg=PA218&dq=ingenuus&source=bl&ots=qSDcfg71Iz&sig=ACfU3U0AaIP93vHcQMtsmyapjzY5EGe7QA&hl=hu&sa=X&ved=2ahUKEwjz2pnC7e3pAhWx_CoKHaISDagQ6AEwD3oECAUQAQ#v=onepage&q=ingenuus&f=false |accd=2020-06-06}}</ref>
<references* /><ref>{{Cite web |title=Roman Emperors - DIR Ingenuus |url=http://www.roman-emperors.org/ingen.htm |work=www.roman-emperors.org |accessdate=2020-06-06}}</ref>
