APA Style

Drucker, P, F. (2017). The effective executive : the definitive guide to getting the right things done (50th Anniversary Ed.). New York: HarperBusiness, an imprint of HarperCollinsPublishers.

MLA Style

Drucker, Peter, F.. "The effective executive : the definitive guide to getting the right things done". 50th Anniversary Ed. New York: HarperBusiness, an imprint of HarperCollinsPublishers, 2017. BOOK.