共 13 条
[2]
Cockett AT, 1993, 2 INT CONS BEN PROST, P553
[3]
Cronbach LJ, 1951, PSYCHOMETRIKA, V16, P297
[4]
Fleiss J.L., 1999, DESIGN ANAL CLIN EXP
[5]
FOWLER FJ, 1993, P SURVEY METHODS SEC, P730
[6]
FRIEDMAN LM, 1985, FUNDAMENTALS CLIN TR, P33
[10]
MCCONNELL JD, 1994, 940582 US DEP HLTH H