edited by Arthur H. Seidman
McGraw-Hill, 1983
Buku Referensi
Woodruff, L.F., author
Wiley Eastern, 1938
Buku Teks
Still, Alfred, author
McGraw-Hill, 1927
Buku Teks
Weedy, B.M., author
John Wiley & Sons, 1993
Buku Teks
Weedy, B.M., author
John Wiley & Sons, 1980
Buku Teks