Natsume, Soeki, author
Vermont : Charles E. Tuttle, 1979
Buku Teks
staff of Research and Education Association, Max Fogiel, director
California Research and Education Association, 1987
Buku Teks
Gropin, Marc
Oxford University Press, 2002
Buku Teks
translated by Zai Jiangyue and Mou Aipeng
Guangxi Normal University Press, 2010
Buku Teks
World Health Organization, 1955
Buku Teks