Dock, V. Thomas, author
Reston Publishing, 1973
Buku Teks
Smith, Marilyn Z., author
Houghton-Mifflin, 1974
Buku Teks
Drummond, Marshall E., author
Wadsworth, 1973
Buku Teks
Seidel, Kenneth P., author
Goodyear , 1971
Buku Teks
Cohn, Laurence S., author
Wiley-Interscience, 1975
Buku Teks