Assalaamu'Alaikum WarahmatUllahe Wabarakatuho
"A person can read it from book, Memorization is not 'Must'. Also other duas which are in Quraan or Ahadith, one can do while looking at text as well."
But one should have intention of it (intention of doing dua) as well as it will be better and is recommended by many people to know translation first. So that you may understand that what you are asking, and the feelings of asking by looking at text from Allah Subhanaho Wa Ta'ala remains as it is while a person ask what ever is in his mind.
Allah Knows Best