Williams, D., Swingler, H., Josephs, W., Hunter, R., Collins, S., Cotty, D., . . . productions, G. (1970). fi000092: Shadow of progress.
Dyfyniad Arddull ChicagoWilliams, Derek, et al. Fi000092: Shadow of Progress. 1970.
Dyfyniad MLAWilliams, Derek, et al. Fi000092: Shadow of Progress. 1970.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.