Sage, 2010
Buku Referensi
Gershon J. Shugar ... [and others]
McGraw-Hill, 1981
Buku Referensi
Shugar, Gershon J., author
McGraw-Hill, 1973
Buku Referensi
Shugar, Gershon J., author
McGraw-Hill, 1973
Buku Referensi
Haupt, Arthur, author
Population Reference Bureau, 1998
Buku Referensi