Lorie, James H., author
Irwin, 1985
Buku Teks
Artikel Jurnal
I Putu Gede Ary Suta, 1958-, author
Yayasan Sad Satria Bhakti, 2000
Buku Referensi
FEUI - Management Research Center (MRC), {s.a}
Majalah, Jurnal, Buletin
Krause, Lawrence B., author
Prentice-Hall, 1964
Buku Teks