by Paik Chull [and others]
Mirae Munhwa Sa, 1981
Buku Teks
Perum Percetakan Uang Republik Indonesia, [date of publication not identified]
Buku Referensi
James, Marquis, author
Harper and Brother, 1954
Buku Teks
Bzztoh, 1977
Buku Teks
Untermeyer, Louis
Simon and Schuster, 1955
Buku Teks