2
Yazar: Rosen, David, 1961-
Baskı/Yayın Bilgisi 2003
Full text available from Career & Technical Education Database
Full text available from Education Database
Elektronik Ekitap
3
Baskı/Yayın Bilgisi 2009
Full text available from Career & Technical Education Database
Full text available from Education Database
Elektronik Ekitap
4
Yazar: Partin, Ronald L.
Baskı/Yayın Bilgisi 2003
Full text available from Education Database
Elektronik Ekitap