Forman, E. (1991). Survey sampling principles. Marcek Dekker.
Chicago Edition CitationForman, E.K. Survey Sampling Principles. New York: Marcek Dekker, 1991.
Cita MLAForman, E.K. Survey Sampling Principles. Marcek Dekker, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.