Citazione Stile APA (7a Edizione)

Koontz, H. (1981). A practical introduction to business. Richard D. Irwin.

Citazione stile Chigago Style (17a edizione)

Koontz, Harold. A Practical Introduction to Business. Homewood, Ill.: Richard D. Irwin, 1981.

Citatione MLA (9a ed.)

Koontz, Harold. A Practical Introduction to Business. Richard D. Irwin, 1981.