Encyclopedia of practical management 4 : delegating work
by Joseph T. Straub
Gemini Books, 2000
 Buku Referensi
Encyclopedia practical management 7 : building and leading teams
by Joseph T. Straub
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 11 : understanding financial statements
by Joseph T. Straub
Gemini Books, 2000
 Buku Referensi
Encyclopedia of practical management 14 : giving great presentations
by Jeff Olson
Gemini Books, 2000
 Buku Referensi