Williams, A. L., Embree, H. D., & DeBey, H. J. (1981). Introduction to chemistry (3rd ed.). Addison-Wesley.
Dyfyniad Arddull ChicagoWilliams, Arthur L., Harland D. Embree, and Harold J. DeBey. Introduction to Chemistry. 3rd ed. Reading, MA: Addison-Wesley, 1981.
Dyfyniad MLAWilliams, Arthur L., et al. Introduction to Chemistry. 3rd ed. Addison-Wesley, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.