Richardson, Matthew; Dominowska, Ewa; Ragno, Robert (2007). "Predicting clicks: Estimating the click-through rate for new ads". Proceedings of the 16th international conference on World Wide Web. pp.521–530. doi:10.1145/1242572.1242643. ISBN978-1-59593-654-7.
Farris, Paul W.; Neil T. Bendle; Phillip E. Pfeifer; David J. Reibstein (2010). Marketing Metrics: The Definitive Guide to Measuring Marketing Performance. Upper Saddle River, New Jersey: Pearson Education, Inc. ISBN0-13-705829-2. The Marketing Accountability Standards Board (MASB) endorses the definitions, purposes, and constructs of classes of measures that appear in Marketing Metrics as part of its ongoing Common Language in Marketing Project.