Zweig, Arnold
Berlin Aufbau 1959
Buku Teks
Guth, Hans P., author
Belmott,
Buku Teks
edited by Leonard F. Dean
Harcourt, Brace, 1951
Buku Teks
Zile, Judy Van, author
Wesleyan University Press, 2001
Buku Teks
Cho Dong-wha ... [et al.]
Korean Information Service, 2001
Buku Teks