FARRIS, Paul W. - BENDLE, Neil T. - PFEIFER, Phillip E. Marketing metrics : the definitive guide to measuring marketing performance. 2nd ed. Upper Saddle River : Pearson Education/Prentice Hall, 2010, 6th printing 2012. xv, 414 s. ISBN 978-0-13-705829-7. [Copy count : 2, currently available 2, at library only 0]