Gaya APA

Carey, S, D., Beiser, A. (2000). Study Guide to Accompany : The Physical Universe (Ninth Edition). Boston: McGraw-Hil Companies,Inc..

Gaya MLA

Carey, Steven, D.., Beiser, Arthur. "Study Guide to Accompany : The Physical Universe". Ninth Edition Boston: McGraw-Hil Companies,Inc., 2000. Text.