While Pardee Library does not currently have a comprehensive guide for valuation, we do have various books on the subject. Valuing a business: the analysis and appraisal of closely held companies by Shannon P. Pratt and Alina V. Nivulita is a good introduction.
You may find further resources through the BU Libraries Search. Use the keywords "valuation" and "corporate" or "business," then use the filters on the right-hand side to select your desired format (i.e. books, journal articles, etc.).
