Colloquium on Trees in Algebra and Programming Copenhagen, Denmark, & Arnold, A. (1990). CAAP '90: 15th Colloquium on Trees in Algebra and Programming, Copenhagen, Denmark, May 1990, proceedings. Springer-Verlag.
Chicago-referens (17:e uppl.)Colloquium on Trees in Algebra and Programming Copenhagen, Denmark, och A. Arnold. CAAP '90: 15th Colloquium on Trees in Algebra and Programming, Copenhagen, Denmark, May 1990, Proceedings. Berlin ; New York: Springer-Verlag, 1990.
MLA-referens (8:e uppl.)Colloquium on Trees in Algebra and Programming Copenhagen, Denmark, och A. Arnold. CAAP '90: 15th Colloquium on Trees in Algebra and Programming, Copenhagen, Denmark, May 1990, Proceedings. Springer-Verlag, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.