David A. Hofmann, Michael Frese, editor
Routledge, 2011
Buku Teks
Hall, Richard H., author
Prentice-Hall, 1991
Buku Teks
Hall, Richard H., author
Prentice-Hall, 1999
Buku Teks
Siregar, Lucia B., author
Universitas Indonesia, 2004
UI - Tesis (Membership)
Mitchell, Terence R., author
McGraw-Hill Kogakusha, 1978
Buku Teks