Gaya APA

Drucker, Peter F.. (1985). The effective executive:the definitive guide to getting the right things done/ Peter F.Drucker . New York: Collins Publisher.

Gaya Chicago

Drucker, Peter F.. The effective executive:the definitive guide to getting the right things done/ Peter F.Drucker. New York: Collins Publisher, 1985. Text.

Gaya MLA

Drucker, Peter F.. The effective executive:the definitive guide to getting the right things done/ Peter F.Drucker. New York: Collins Publisher, 1985. Text.

Gaya Turabian

Drucker, Peter F.. The effective executive:the definitive guide to getting the right things done/ Peter F.Drucker. New York: Collins Publisher, 1985. Print.