Shanson, D. (1981). Dr DC Shasson replies as follows.
Dyfyniad Arddull ChicagoShanson, DC. Dr DC Shasson Replies As Follows. 1981.
Dyfyniad MLAShanson, DC. Dr DC Shasson Replies As Follows. 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.