Blaustein Dan, Butler Louise, Hixson Bryce, & Matthias Wanda. (1999). Science An Introduction to the Life, Earth, and Physical Sciences. American: McGraw-Hill.
Dyfyniad Arddull ChicagoBlaustein Dan, Butler Louise, Hixson Bryce, và Matthias Wanda. Science An Introduction to the Life, Earth, and Physical Sciences. American: McGraw-Hill, 1999.
Dyfyniad MLABlaustein Dan, Butler Louise, Hixson Bryce, và Matthias Wanda. Science An Introduction to the Life, Earth, and Physical Sciences. American: McGraw-Hill, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.