Raj,Des, & Chandhok, P. (1999). Sample survey theory. Narosa.
Dyfyniad Arddull ChicagoRaj,Des, and Promod Chandhok. Sample Survey Theory. New Delhi: Narosa, 1999.
Dyfyniad MLARaj,Des, and Promod Chandhok. Sample Survey Theory. Narosa, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.