Carey, S. D., & Beiser, A. (1997). Study guide to accompany Krauskopf & Beiser: The physical universe. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Carey, Steven D., agus Arthur Beiser. Study Guide to Accompany Krauskopf & Beiser: The Physical Universe. New York: McGraw-Hill, 1997.
Lua MLA (9ú heag.)Carey, Steven D., agus Arthur Beiser. Study Guide to Accompany Krauskopf & Beiser: The Physical Universe. McGraw-Hill, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.