APA (7th ed.) Citation

Bird, J. O., & May, A. J. C. (1986). Business calculations (2nd ed.). Longman.

Chicago Style (17th ed.) Citation

Bird, J. O., and A. J. C. May. Business Calculations. 2nd ed. London: Longman, 1986.

MLA (9th ed.) Citation

Bird, J. O., and A. J. C. May. Business Calculations. 2nd ed. Longman, 1986.