Longley, Dennis, author
Macmillan, 1986
Buku Referensi
Sippl, Charles J., author
Macmillan, 1985
Buku Referensi
Vollnhals, Otto, author
Elsevier, 1984
Buku Referensi
Allaby, Michael, author
Macmillan, 1985
Buku Referensi
Eigen, Lewis D., author
Macmillan Publishing Company, 1993
Buku Referensi