APA aipamena

Hawking, S. P. Nature of space and time. OUP.

Chicago Style aipamena

Hawking, Stephen Penrose. Nature of Space and Time. OUP.

MLA aipamena

Hawking, Stephen Penrose. Nature of Space and Time. OUP.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.