Parkinson, Cyril Northcote, 1909-1993, author
Federal Publications, [Date of publication not identified]
Buku Teks
Phildephia : JB Lippincott company , 1975
Buku Teks
Miner, John B., author
McGraw-Hill, 1963
Buku Teks
O`Brien, James A., 1936-, author
Richard D. Irwin, 1975
Buku Teks
Amrine, Harold T., author
Prentice-Hall, 1983
Buku Teks