Books about marketing plans can be found in the HF 5415.1 shelf area of the Bronfman Business Library.
We also recommend you use Omni (Omni All-In-One Search) to find books and e-books which can explain how to build an effective marketing plan. We recommend you use the search string: "marketing plan". When results display note that you can use filters on the left menu area under "Format" to filter to books or e-books.