I've just started an MA in a marketing-related subject and my first essay is due tomorrow. My tutor has always said that the textbook for this module (Marketing: An Introduction) is not a suitable source and not something we can reference. I thought, fair enough, it's mainly an educational tool (similar to Pearson textbooks, etc) and isn't really academic.
However, today he clarified to me that ALL books are banned from being cited - even if they're peer-reviewed, academic works by reputable scholars. Only journal articles are acceptable as sources. Even if I'm citing a theory that originated in a book, he wants me to cite a journal article that references the theory (e.g. Smith, 2021 as cited in Jones, 2022).
I find this very bizzare. It's one thing to ban Wikipedia and whatnot, but to forbid ANY form of book and only allow articles? What purpose is this rule meant to serve? Has anyone else had experience of this?
Yes, I know I could just ask him, but I don't feel he's a tutor I can just approach with a lot of questions, for various reasons.