Foreign Languages Publishing House, 1960
Buku Teks
translated by George H. Hanna
Foreign Languages Publishing House, 1960
Buku Teks
Rothstein, Andrew, author
Penguin Books , 1950
Buku Teks
Progress , 1965
Buku Teks
Otis, William Bradley, author
Barnes & Noble, 1939
Koleksi Publik