Robertson, G., D., J. et al.(1970).Medical Electronic Equipment 1969 - 70 : Laboratory System and Equipment ( Analytical ) Vol III .Oxford:Pergamon Press.
Gaya MLA
Robertson, G., D., J. et al..Medical Electronic Equipment 1969 - 70 : Laboratory System and Equipment ( Analytical ) Vol III.Oxford:Pergamon Press,1970.Lawas.