Balfour, G. W. (1894). The senile heart: Its symptoms, sequelae, and treatment. MacMillan.
Dyfyniad Arddull ChicagoBalfour, George William. The Senile Heart: Its Symptoms, Sequelae, and Treatment. New York: MacMillan, 1894.
Dyfyniad MLABalfour, George William. The Senile Heart: Its Symptoms, Sequelae, and Treatment. MacMillan, 1894.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.