Citazione Stile APA (7a Edizione)

Ople, B. F. (2002). The invisible army. IN Horizons [column]: Strategic concepts. Manila Bulletin.

Citazione stile Chigago Style (17a edizione)

Ople, Blas F. "The Invisible Army. IN Horizons [column]: Strategic Concepts." Manila Bulletin 2002.

Citatione MLA (9a ed.)

Ople, Blas F. "The Invisible Army. IN Horizons [column]: Strategic Concepts." Manila Bulletin, 2002.