Hamper, Robert J.,
Strategic market planning/ Robert J.Hamper
NTC Bussiness Book, 1992
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Chisnall, Peter M
Strategic industrial marketing
Prentice-Hall, 1989
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Global strategic planning : how 17 of the world's best companies are building market share and achieving corporate objectives
prepared by Business International Corporation
Business International Corporation,, 1991
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Heijbroek, A.M.A.
The world seed market : developments and strategies
Rabobank International Group , 1996
 Buku Teks
Progress in language planning: international perspectives
edited by Juan Cobarrubias and Joshua A. Fishman
Mouton, 1983
 Buku Teks SO