APA

Drucker P. F., . (1974). Management: tasks, responsibilities, practices. New York: Harper & Row.

Chicago

Drucker Peter Ferdinand, . 1974. Management: tasks, responsibilities, practices. New York: Harper & Row.

Harvard

Drucker P. F., . (1974). Management: tasks, responsibilities, practices. New York: Harper & Row.

MLA

Drucker Peter Ferdinand, . Management: tasks, responsibilities, practices. New York: Harper & Row. 1974.