Buck, A. E., author
Public Administration Service, 1949
Buku Teks
edited by R.C. Bellan, W.H. Pope
McGraw-Hill, 1981
Buku Teks
Clokie, H. Mcd.
Toronto Langmans, Green 1950
Buku Teks
C.J. Harris, editor
Quick Canadian Fact , 1981
Buku Referensi
[publisher not identified], [date of publication not identified]
Buku Teks