Cita APA (7a ed.)
S, T., M, M., T, v. A., BJ, P., & GF, B. (2008). Sample size calculations for 3-level cluster randomized trials. Clinical Trials, 5(5), 486-496.
Cita Chicago Style (17a ed.)
S, Teerenstra, Moerbeek M, van Achterberg T, Pelzer BJ, y Borm GF. "Sample Size Calculations for 3-level Cluster Randomized Trials." Clinical Trials 5, no. 5 (2008): 486-496.
Cita MLA (9a ed.)
S, Teerenstra, et al. "Sample Size Calculations for 3-level Cluster Randomized Trials." Clinical Trials, vol. 5, no. 5, 2008, pp. 486-496.
Precaución: Estas citas no son 100% exactas.