De Castro, E. (2017). Over-extended pawn. IN Let's Play CHESS [column]. Philippine Star.
Cita Chicago (17th ed.)De Castro, Edgar. "Over-extended Pawn. IN Let's Play CHESS [column]." Philippine Star 2017.
Cita MLA (9th ed.)De Castro, Edgar. "Over-extended Pawn. IN Let's Play CHESS [column]." Philippine Star, 2017.
Atenció: Aquestes cites poden no estar 100% correctes.