Ruchyat Kosasih
Ruchko, 1985
Buku Teks
Culey, Ray T., author
South-Western Publishing, 1953
Buku Teks
Pickett, K.H. Spencer, author
John Wiley & Sons, 2005
Buku Referensi
by Philip L. Defliese ... [and others]
John Wiley & Sons, 1987
Buku Teks
Johnson, James T., author
South-Western Publishing, 1960
Buku Teks