Ministry of Education, Science and Culture, 1985
Buku Referensi
edited by Statistical Research and Training Institute
Japan Statistical Association, 2004
Buku Referensi
IPSA; AISP, 2009
Multimedia
Edwards, Allen L.
Holt, Rinehart and Winston, 1964
Buku Teks
Ferguson, George Andrew, author
McGraw-Hill , 1981
Buku Teks