Bibliografi
No Inv.: 1244-1245/BD/Perp/86/2c
No Inv.: 129895/SM/Perp/11/1c~136697/SM/Perp/14/1c
No Inv.: 110007/PSM/Perp/07/1c~114489-114493/P/Perp/08/5c~116554/S/Perp/09/1c~117405-117406/P/Perp/09/2c~118984-118986/P/Perp/09/3c
No Inv.: 4222-4224/P/Perp/91/3c~1547-1549/BD/Perp/91/3c
No Inv.: 179-180/PSM/Perp/98/2c~102700/S/Perp/05/1c~104290-104294/P/Perp/06/5c~112060-112064/P/Perp/08/5c~114575/S/Perp/08/1c~115213/S/Perp/08/1c~115511/SM/Perp/08/1c~135050/SM/Perp/13/1c
No Inv.: 1375-1377/S/Perp/91/3c
Bibliografi : hlm. 385-386No Inv.: 144251/SM?Perp/14/1c
Judul asli : "The Psychology of Vocational Choice"