Authors must be entered in the record - one per line. Best to enter surname, firstname or with spaces between the initials.
Bellotti, V.
Ducheneaut, Nicolas
Howard, Mark
Smith, Ian
Grinter, Rebecca E.
or
Bellotti, V
Ducheneaut, N
Howard, M
Smith, I
Grinter, R E
then your output style settings handle the initial or full firstname and ordering. What output style are you using?