Cita APA (7a ed.)
Asimov, I. Forward the Foundation. Bantam Books.
Cita estilo Chicago (17a ed.)
Asimov, Isaac. Forward the Foundation. Nueva York, EUA: Bantam Books.
Cita MLA (9a ed.)
Asimov, Isaac. Forward the Foundation. Bantam Books.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.