Ferguson, K. (1991). Stephen Hawking: Quest for a theory of everything. Bantam.
Chicago Style aipamenaFerguson, Kitty. Stephen Hawking: Quest for a Theory of Everything. Toronto: Bantam, 1991.
MLA aipamenaFerguson, Kitty. Stephen Hawking: Quest for a Theory of Everything. Bantam, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.