APA (7th ed.) Citation

Wright, H. (1994). Explorer of the universe: A biography of George Ellery Hale. American Inst. of Physics.

Chicago Style (17th ed.) Citation

Wright, Helen. Explorer of the Universe: A Biography of George Ellery Hale. New York: American Inst. of Physics, 1994.

MLA (9th ed.) Citation

Wright, Helen. Explorer of the Universe: A Biography of George Ellery Hale. American Inst. of Physics, 1994.