APA
Kootz H., Weihrich H., . (1990). Essentials of management. New York: McGraw Hill.
Chicago
Kootz Harold, Weihrich Heinz, . 1990. Essentials of management. New York: McGraw Hill.
Harvard
Kootz H., Weihrich H., . (1990). Essentials of management. New York: McGraw Hill.
MLA
Kootz Harold, Weihrich Heinz, . Essentials of management. New York: McGraw Hill. 1990.