共 6 条
[1]
BRADY, 1989, NY TIMES 0829, pA19
[2]
SHAPIRO, 1989, US NEWS WORLD REP, P20
[3]
1977, HARV BUS REV MAY, P6
[4]
1989, WASH POST 0802, pA23
[5]
1989, WALL ST J 1120, pA13
[6]
1989, WALL ST J 0911, pA18