Ignacio, R. (1977). Ang libingang bakal. University of the Philippines Library.
Dyfyniad Arddull ChicagoIgnacio, Rosendo. Ang Libingang Bakal. Quezon City: University of the Philippines Library, 1977.
Dyfyniad MLAIgnacio, Rosendo. Ang Libingang Bakal. University of the Philippines Library, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.