Linguistically, a first person account makes use of first person pronouns like I, us, we, our in narration. Examples of first person accounts in the bible are Ezekial and Isaiah. A third person account uses he, she, it, they and names characters in the account by name. They never make reference to the narrator using first person pronouns. Examples of third person accounts include Kings and Chronicles. While grammatically an account cannot be both a first and third person account, that seems to be a popular choice and I will include it.