APA (7th ed.) Citation

Arnold, A. (1980). Once upon a galaxy: A journal of the making of The empire strikes back (First edition.). Sphere Books.

Chicago Style (17th ed.) Citation

Arnold, Alan. Once upon a Galaxy: A Journal of the Making of The Empire Strikes Back. First edition. London: Sphere Books, 1980.

MLA (9th ed.) Citation

Arnold, Alan. Once upon a Galaxy: A Journal of the Making of The Empire Strikes Back. First edition. Sphere Books, 1980.