Kathleen McCartnet; Deborah Phillips
Blackwell, 2006
Buku Teks
Easterby-Smith, Mark, author
Blackwell publishing, 2003
Buku Teks
edited by Michael A. Hogg and R. Scott Tindale
Blackwell, 2003
Buku Teks
edited by Garth J.O. Fletcher and Margaret S. Clark
Blackwell, 2003
Buku Teks
Schomburg, Dietmar
Springer-Verlag, 1990
Buku Referensi