Schwartz, Harry
Atheneum, 1966
Buku Teks SO
edited by Manfred Morgenstern; created and directed by Hans Hofer
APA Publications, 1995
Buku Teks SO
Fessler, Loren
Time Incorporated, 1963
Buku Teks SO
Schwartz, Harry
Atheneum, 1966
Buku Teks SO
Chief editor, Guang Guo
CYPI Press, 2010
Buku Teks