Gaya APA

Hofstadter, D, R. (1985). Metamagical themas: Questing for the essence of mind and pattern. . Harmondsworth: Harmondsworth Penguin Books.

Gaya MLA

Hofstadter, Douglas, R.. "Metamagical themas: Questing for the essence of mind and pattern. ". Harmondsworth: Harmondsworth Penguin Books, 1985. Buku.