Ople, B. F. (2002). The invisible army. IN Horizons [column]: Strategic concepts. Manila Bulletin.
Chicago Style (17th ed.) CitationOple, Blas F. "The Invisible Army. IN Horizons [column]: Strategic Concepts." Manila Bulletin 2002.
MLA citiranjeOple, Blas F. "The Invisible Army. IN Horizons [column]: Strategic Concepts." Manila Bulletin, 2002.
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