Kim, Joo-Young, author
Si-sa-young-o-sa, 1990
Buku Teks
White, Theodore H., author
William Sloane Associates, 1961
Buku Teks
Handy, Willowdean C.
Australian National University Press,, 1973
Buku Teks
Rossing, Thomas D., author
Addison-Wesley, 1989
Buku Teks
Morse, Philip M., author
McGraw-Hill, 1948
Buku Teks