APA

Drucker P., . (1974). Management : taks, responsabilities, practices. New York: Harper & Row.

Chicago

Drucker Pete, . 1974. Management : taks, responsabilities, practices. New York: Harper & Row.

Harvard

Drucker P., . (1974). Management : taks, responsabilities, practices. New York: Harper & Row.

MLA

Drucker Pete, . Management : taks, responsabilities, practices. New York: Harper & Row. 1974.