Abramovich, Y. (1998). et al.
Chicago Style aipamenaAbramovich, Y. Et Al. Springer-Verlag, Berlin, 1998.
MLA aipamenaAbramovich, Y. Et Al. 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena
Abramovich, Y. (1998). et al.
Chicago Style aipamenaAbramovich, Y. Et Al. Springer-Verlag, Berlin, 1998.
MLA aipamenaAbramovich, Y. Et Al. 1998.