I am relatively new to creative writing, so please bear with me. The story I'm writing has text from a 17th century book inserted verbatim within the story. The inserted text has nothing to do with the story other than to visually illustrate it comes from a very old book. I have purposely changed the font of this passage throughout my story to one in keeping with the time it was written. The excerpts I'm using were reprinted/published by the Cambridge University Press in 1984. Am I obligated to cite this work or get permission of any kind to use this text for publishing purposes?