Chen, P. S. (1950). Syntans and newer methods of tanning. The Chemical Elements.
Dyfyniad Arddull ChicagoChen, Philip Stanley. Syntans and Newer Methods of Tanning. South Lancaster, MA: The Chemical Elements, 1950.
Dyfyniad MLAChen, Philip Stanley. Syntans and Newer Methods of Tanning. The Chemical Elements, 1950.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.