Cita APA (7a ed.)

Madison, B. L., & Hart, T. A. (1990). A challenge of numbers: People in the mathematical sciences. National Academy Press.

Cita Chicago Style (17a ed.)

Madison, Bernard L., y Therese A. Hart. A Challenge of Numbers: People in the Mathematical Sciences. Washington: National Academy Press, 1990.

Cita MLA (9a ed.)

Madison, Bernard L., y Therese A. Hart. A Challenge of Numbers: People in the Mathematical Sciences. National Academy Press, 1990.