APA (7th ed.) Citation

Wright, A., & Wright, H. (1989). At the edge of the universe. Ellis Horwood ; Halsted Press.

Chicago Style (17th ed.) Citation

Wright, Alan, and Hilary Wright. At the Edge of the Universe. Chichester, England : New York: Ellis Horwood ; Halsted Press, 1989.

MLA (9th ed.) Citation

Wright, Alan, and Hilary Wright. At the Edge of the Universe. Ellis Horwood ; Halsted Press, 1989.