Albrecht-Carrie, Rene
Littlefield, Adam & Co., 1959
Buku Teks
Hall, Walter Phelps
Appleton-Century-Crofts, 1957
Buku Teks
Richards, Michael D, author
John Wiley & Sons, 2014
Buku Teks
Longman, 1993
Buku Teks
Wood, Anthony, 1923-, author
Longman, 1983
Buku Teks