Gaya APA

Cooper, H., Henbest, N. (1994). How The Universe Works - For Ages 8-14 (Cet. 1). London: DK Publishing.

Gaya MLA

Cooper, Heather., Henbest, Nigel. "How The Universe Works - For Ages 8-14". Cet. 1 London: DK Publishing, 1994. Text.