Holt, Sverre, author
Commercial press, limited, 1935
Buku Teks
translated into modern Chinese by Zhou Caizhu and Qi Ruiduan ; translated into English by Wang Rongpei and Wang Hong
Hunan People Publishing House, 2006
Buku Teks
Smith, Keri
Perigee , 2008
Buku Teks
Artikel Jurnal
Bradford, Barbara Taylor, author
Grafton, 1990
Buku Teks