Encyclopedia of practical management 4 : delegating work
by Joseph T. Straub
Gemini Books, 2000
 Buku Referensi
Encyclopedia of practical management 8 : making effective decisions
by David F. Folino
Gemini Books, 2000
 Buku Referensi
Encyclopedia of practical management 10 : customer-focused selling
by Len D'Innocenzo and Jack Cullen
Gemini Books, 2000
 Buku Referensi
Encyclopedia of practical management 12 : cutting costs
by Jeff Olson
Gemini Books, 2000
 Buku Referensi
Encyclopedia of practical management 14 : giving great presentations
by Jeff Olson
Gemini Books, 2000
 Buku Referensi