Youse, Bevan K., author
Canfield Press, 1971
Buku Teks
Eicholz, Robert E., author
Addison-Wesley, 1965
Buku Teks
Marer, Fred
Little, Brown and Co., 1960
Buku Teks
Peterson, John A.
John Wiley and Sons, 1963
Buku Teks
Clark, John R.
World Book, 1954
Buku Teks
Addison-Wesley, 1963
Buku Teks