Gaya APA

Beiser, A., Krauskopf, K, B. (1993). The Physical Universe (Edisi 7). New York: Mc Graw-Hill Book Company.

Gaya MLA

Beiser, Arthur., Krauskopf, Konrad, B.. "The Physical Universe". Edisi 7 New York: Mc Graw-Hill Book Company, 1993. Teks.