1Jernudd, Band and J. das Gupta. 1971. Towards a Theory of Language Planning. in J. Rubin and B. Jernudd (eds) ,pp. 195 -215.
2Rider,N. and S. Pons - Ridler. 1986. An Economic Analysis of Canadian Policies :A Model and Its Implementation. Language Problems and Language Planning10. 1,42 --58.
3Ayo Bamgbose. Language. As a Resource : an African Perspetive. Therde of the African Languges in democratic South Africa. University of Pretoria, 1998..
4B. Whorf. The Relation of Habitual Thought and Behavior to Language. in J. Carroll (ed). Language,Thought and Reality. Selected Wrighting of Benjamin Lee Whorf, MTT, 1956.
