Watson, J. H., & Nicholas Meyer [ed.]. (1975). Seven percent solution. Hodder and Stoughton.
Dyfyniad Arddull ChicagoWatson, John H., and Nicholas Meyer [ed.]. Seven Percent Solution. London: Hodder and Stoughton, 1975.
Dyfyniad MLAWatson, John H., and Nicholas Meyer [ed.]. Seven Percent Solution. Hodder and Stoughton, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.