APA (7th ed.) Citation

Black, J., & Bradley, J. F. (1980). Esssential mathematics for economists. John Wiley & sons.

Chicago Style (17th ed.) Citation

Black, J., and J. F. Bradley. Esssential Mathematics for Economists. Chichester: John Wiley & sons, 1980.

MLA (8th ed.) Citation

Black, J., and J. F. Bradley. Esssential Mathematics for Economists. John Wiley & sons, 1980.