Successful focus groups : advancing the state of the art / ed. lit. David L. Morgan

Successful focus groups : advancing the state of the art / ed. lit. David L. Morgan . - Newbury Park : Sage, 1993 . - XV, 271 p. 22 cm . - (Sage focus editions . 156)
0-8039-4874-3 (brochado) : compra
Metodologia científica