Synthetic materials for electronics: proceedings of the second international summer school
edited by B. Jakowlew, A. Szymanski, W. Wlosinski
Elsevier, 1981
 Buku Teks
Brazier, Rodney
Constitutional practice
Oxford University Press, 1988
 Buku Teks
Pharmacy practice
edited by Kevin Taylor, Geoffrey Harding
Routledge, 2001
 Buku Teks
Catt, Helena
Democracy in practice
Routledge , 1999
 Buku Teks
Drucker, Peter Ferdinand, 1909-2005
The practice of management
Pan Books, 1982
 Buku Teks