Chapman, Robert D., author
W.H. Freeman, 1978
Buku Teks
Jefferys, William H., author
John Wiley & Sons, 1981
Buku Teks
Robbins, Robert R., author
John Wiley & Sons, 1981
Buku Teks
Baker, Robert H., author
D. Van Nostrand, 1964
Buku Teks
Morrison, David, author
Saunders College, 1990
Buku Teks