Mengefektifkan kinerja / Sam Deep, Lyle Sussman; penerjemah, Arif Suyoko

 Deep, Sam; Sussman, Lyle; Suyoko, Arif;

Jakarta : Pustaka binaman pressindo , 1996

Kepemimpinan positif / Mike Pegg; penerjemah Arif Suyoko

 Suyoko, Arif; Pegg, Mike;

Jakarta : Pustaka binaman pressindo , 1994