APA Style

A., V. et al (1991). Group Theory from a Geometrical Viewpoint. 26 March - 6 April 1990. ICTP. Trieste. Italy . Singapore: WORLD SCIENTIFIC.

MLA Style

A., Verjovsky.. et al. "Group Theory from a Geometrical Viewpoint. 26 March - 6 April 1990. ICTP. Trieste. Italy". Singapore: WORLD SCIENTIFIC, 1991. Buku.