Philip's world reference atlas
Chancellor , 2001
 Buku Referensi
Handbook of modern accounting theory / edited Norton Backer
Prentice-Hall, 1959
 Buku Teks
Painter, Richard W.
Employment rights : a reference handbook
Pluto Press, 1993
 Buku Teks
Shugar, Gershon J.
The chemist's ready reference handbook
McGraw-Hill, 1990
 Buku Referensi
Lewis, Jack R.
Architectural draftsman's reference handbook
Prentice-Hall, 1982
 Buku Referensi