Smullyan, R. M. (1993). Recursion theory for metamathematics. Oxford University Press.
Čikaški stil citiranja (17. izdanje)Smullyan, Raymond M. Recursion Theory for Metamathematics. New York: Oxford University Press, 1993.
MLA način citiranja (9. izdanje)Smullyan, Raymond M. Recursion Theory for Metamathematics. Oxford University Press, 1993.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.