Cita APA

Ashby, D., & Machin, D. (1993). Stopping rules, interim analyses and data monitoring committees. Nature Publishing Group.

Citación estilo Chicago

Ashby, D., y D. Machin. Stopping Rules, Interim Analyses and Data Monitoring Committees. Nature Publishing Group, 1993.

Cita MLA

Ashby, D., y D. Machin. Stopping Rules, Interim Analyses and Data Monitoring Committees. Nature Publishing Group, 1993.