BANGS, D. H. (1995). Pedoman Perencanaan Usaha(the Business Planning Guide). Erlangga.
Dyfyniad Arddull ChicagoBANGS, David H. Pedoman Perencanaan Usaha(the Business Planning Guide). Erlangga, 1995.
Dyfyniad MLABANGS, David H. Pedoman Perencanaan Usaha(the Business Planning Guide). Erlangga, 1995.
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