Cita APA (7th ed.)

Chow, S., Shao, J., & Wang, H. (2008). Sample size calculations in clinical research (2nd ed.). Chapman & Hall/CRC.

Cita Chicago (17th ed.)

Chow, Shein-Chung, Jun Shao, i Hansheng Wang. Sample Size Calculations in Clinical Research. 2nd ed. Boca Raton: Chapman & Hall/CRC, 2008.

Cita MLA (9th ed.)

Chow, Shein-Chung, et al. Sample Size Calculations in Clinical Research. 2nd ed. Chapman & Hall/CRC, 2008.