Ople, B. F. (2002). The invisible army. IN Horizons [column]: Strategic concepts. Manila Bulletin.
Citación estilo ChicagoOple, Blas F. "The Invisible Army. IN Horizons [column]: Strategic Concepts." Manila Bulletin 2002.
Cita MLAOple, Blas F. "The Invisible Army. IN Horizons [column]: Strategic Concepts." Manila Bulletin, 2002.
Warning: These citations may not always be 100% accurate.