APA Style

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

MLA Style

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