Gokel, G. W. (1991). Crown ethers and cryptands. Royal Society of Chemistry.
Dyfyniad Arddull ChicagoGokel, George W. Crown Ethers and Cryptands. Cambridge: Royal Society of Chemistry, 1991.
Dyfyniad MLAGokel, George W. Crown Ethers and Cryptands. Royal Society of Chemistry, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.