Sources of unofficial UK statistics
compiled by David Mort and Leona Siddall
Gower, 1985
 Buku Referensi
Pieper, F.C.
SISCIS: Subject index to sources of comparative international statistics
CBD Research, 1978
 Buku Teks
Pieper, F.C.
SISCIS: Subject index to sources of comparative international statistics
CBD Research, 1978
 Buku Teks
McClave, James T.
Statistics
Prentice-Hall, 2000
 Buku Teks
McClave, James T.
Statistics
Dellen Publishing, 1979
 Buku Teks