APA (7th ed.) Citation

Hall, A. G., & Hall, K. M. (1976). Modern commerce: An introductory course. Heinemann Educational Books.

Chicago Style (17th ed.) Citation

Hall, A. G., and K. M. Hall. Modern Commerce: An Introductory Course. London: Heinemann Educational Books, 1976.

MLA (9th ed.) Citation

Hall, A. G., and K. M. Hall. Modern Commerce: An Introductory Course. Heinemann Educational Books, 1976.