National Film Board of Canada. Pacific Regional Production Centre, Wright, J., Taylor, J., McKay, D., Foon, D., & Hall, R. (1986). Differences. National Film Board of Canada.
Dyfyniad Arddull ChicagoNational Film Board of Canada. Pacific Regional Production Centre, John Wright, John Taylor, Doug McKay, Dennis Foon, and Raymond Hall. Differences. [Canada]: National Film Board of Canada, 1986.
Dyfyniad MLANational Film Board of Canada. Pacific Regional Production Centre, et al. Differences. National Film Board of Canada, 1986.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.