Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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