Hurd, A. (1974). et al.
Chicago Style aipamenaHurd, Albert. Et Al. Springer-Verlag, Berlin, 1974.
MLA aipamenaHurd, Albert. Et Al. 1974.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena
Hurd, A. (1974). et al.
Chicago Style aipamenaHurd, Albert. Et Al. Springer-Verlag, Berlin, 1974.
MLA aipamenaHurd, Albert. Et Al. 1974.