Johnson, James T., author
South-Western Publishing, 1960
Buku Teks
Johnson, James T., author
South-Western Publishing, 1965
Buku Teks
Carmichael, D.R. (Douglas R.), 1941-, author
McGraw-Hill, 1971
Buku Teks
Ray, J.C., author
Holt, Rinehart and Winston, 1964
Buku Teks
Silvoso, Joseph A., author
Ohio South-Western, 1965
Buku Teks