APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Black, John, and James F. Bradley. Essential Mathematics for Economists. London: Wiley, 1973.

MLA (9th ed.) Citation

Black, John, and James F. Bradley. Essential Mathematics for Economists. Wiley, 1973.