du Toit, C. M. (1990). Fundamental Business Economics (Second Edition). ELSEVIER.
Cita Chicago (17th ed.)du Toit, C M. Fundamental Business Economics (Second Edition). ELSEVIER, 1990.
Cita MLA (8th ed.)du Toit, C M. Fundamental Business Economics (Second Edition). ELSEVIER, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.