Hubbard, L. Ron, 1911-1986, author
Bridge Publications, Inc., 2012
Buku Referensi
Reilly, Kevin, author
Harper and Row, c1980
Buku Teks
Wallbank, T. Walter, author
Scott, Foreman, 1965
Buku Teks
Wallbank, T. Walter, author
Scott, Foresman, 1965
Buku Teks
Wallbank, T. Walter, author
Scott, Foresman, 1965
Buku Teks