Cita APA (7a ed.)

Swinscow, T. D. V., & Campbell, M. J. (1997). Statistics at square one (9th ed., 2nd impr. / revised by M.J. Campbell.). BMJ Publishing Group.

Cita Chicago Style (17a ed.)

Swinscow, T. D. V., y Michael Joseph Campbell. Statistics at Square One. 9th ed., 2nd impr. / revised by M.J. Campbell. London: BMJ Publishing Group, 1997.

Cita MLA (9a ed.)

Swinscow, T. D. V., y Michael Joseph Campbell. Statistics at Square One. 9th ed., 2nd impr. / revised by M.J. Campbell. BMJ Publishing Group, 1997.