Guth, Hans P., author
Wadsworth, 1969
Buku Teks
Heffernan, James A.W., author
W.W. Norton & Company, 1986
Buku Referensi
Heffernan, James A. W., author
W.W. Norton & Company, 1990
Buku Referensi
Heffernan, James A.W.
W.W. Norton & Company, 1986
Buku Teks
Marius, Richard, author
McGraw-Hill, 1988
Buku Teks