Kurtz, Max, author
McGraw-Hill, 1991
Buku Referensi
Smith, Jon M., author
Wiley, 1977
Buku Teks
Kahn, Peter B., author
John Wiley & Sons, 1990
Buku Teks
Serfling, Robert J., author
John Wiley & Sons, 1980
Buku Teks
Tuma, Jan J., author
McGraw-Hill, 1975
Buku Teks