George, Thomas F
Prentice-Hall, 1987
Buku Teks
Brown, Robert F., author
Wadsworth, 1980
Buku Teks
Korth, Hoinz
Verlag die Wirschaft, 1972
Buku Teks
Bowen, Earl K., author
Richard D. Irwin , 1971
Buku Teks
Bowen, Earl K., author
Richard D. Irwin, 1963
Buku Teks