Cita APA (7th ed.)

Black, J., & Bradley, J. F. (1973). Essential mathematics for economists. J. Wiley.

Cita Chicago (17th ed.)

Black, John, i J. F. Bradley. Essential Mathematics for Economists. London, ; New York,: J. Wiley, 1973.

Cita MLA (8th ed.)

Black, John, i J. F. Bradley. Essential Mathematics for Economists. J. Wiley, 1973.