Day, Robert W., author
McGraw-Hill, 2002
Buku Referensi
Day, Robert W., author
McGraw-Hill, 2012
Buku Teks
Day, Robert W., author
McGraw-Hill, 2000
Buku Referensi
edited by Mario Paz
Chapman & Hall, 1994
Buku Referensi
Day, Robert W., author
McGraw-Hill, 2012
Buku Teks