Shum, K. P. (1998). et al.
Chicago Style aipamenaShum, Kar Ping. Et Al. Springer-Verlag, Singapore, 1998.
MLA aipamenaShum, Kar Ping. Et Al. 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena
Shum, K. P. (1998). et al.
Chicago Style aipamenaShum, Kar Ping. Et Al. Springer-Verlag, Singapore, 1998.
MLA aipamenaShum, Kar Ping. Et Al. 1998.