Aside from citing articles and books, have you ever wondered how to cite a company annual report or an industry report? The reality is, there is no "official" style for citing business sources. However, it is common practice to use adaptations of one of the following citation styles: the American Psychological Association (APA) Style or the Chicago Style. Whichever style you choose, use it consistently for the entire project/paper.
Key Business Ratios provides ratios for the most current 4 years. If you’d like to get the older ratios, Mergent Archives is the appropriate source.
Almanac of Business and Industrial Financial Ratios Dunbar Ref Bookcase 3, HF5681 .R25A45
RMA Annual Statement Studies Dunbar Ref Bookcase 3, HF5681 .B2R6