Encyclopedia is Tertiary, Diary is Primary, and Interview is Primary. Documentary comes directly from the main source, the person with the camera. Nothing is in the middle.
Explanation: because the encyclopedia gives info FROM books so since it's not from the person themselves or somebody that experienced it then it's secondary documentary you're examining a person or event depending on the facts and a diary is first person because it's from the writer and an interview is first person because it's basically insight on the person that's actually there despite documentary sounds secondary an documentary is more secondary
