edited by Muriel Albers Bittel, Lester Robert Bittel and Jackson Eugene Ramsey
Grolier International, 1995
Buku Referensi
Shapiro, Benson P.
Richard D. Irwin, 1985
Buku Teks SO
Allen, Louis A.
McGraw-Hill , 1973
Buku Teks SO
Robbins, Stephen P.
Prentice-Hall, 1997
Buku Teks
Hitt, Michael A.
Pearson, 2009
Buku Teks