Levy, P. S., & Lemeshow, S. (1999). Sampling of populations: Methods and applications (3a. ed.). John Wiley & Sons.

Levy, Paul S., and Stanley Lemeshow. Sampling of Populations: Methods and Applications. 3a. ed. Nueva York: John Wiley & Sons, 1999.

Levy, Paul S., and Stanley Lemeshow. Sampling of Populations: Methods and Applications. 3a. ed. John Wiley & Sons, 1999.