Không rõ. (1976). Queueing Systems. NOTNXB.
Dyfyniad Arddull ChicagoKhông rõ. Queueing Systems. NOTNXB, 1976.
Dyfyniad MLAKhông rõ. Queueing Systems. NOTNXB, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
Không rõ. (1976). Queueing Systems. NOTNXB.
Dyfyniad Arddull ChicagoKhông rõ. Queueing Systems. NOTNXB, 1976.
Dyfyniad MLAKhông rõ. Queueing Systems. NOTNXB, 1976.