Proceedings of the Academy of Natural Sciences of Philadelphia. Academy of Natural Sciences.
Style de citation Chicago (17e éd.)Proceedings of the Academy of Natural Sciences of Philadelphia. Academy of Natural Sciences.
Style de citation MLA (8e éd.)Proceedings of the Academy of Natural Sciences of Philadelphia. Academy of Natural Sciences.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.