Workshop on Specification of Abstract Data Types Wusterhausen, Brandenburg, Germany, & Ehrig, H. (1991). Recent trends in data type specification: 7th Workshop on Specification of Abstract Data Types, Wusterhausen/Dosse, Germany, April 17-20, 1990 : proceedings. Springer-Verlag.
Chicago-viite (17. p.)Workshop on Specification of Abstract Data Types Wusterhausen, Brandenburg, Germany, ja Hartmut Ehrig. Recent Trends in Data Type Specification: 7th Workshop on Specification of Abstract Data Types, Wusterhausen/Dosse, Germany, April 17-20, 1990 : Proceedings. Berlin ; New York: Springer-Verlag, 1991.
MLA-viite (8. p.)Workshop on Specification of Abstract Data Types Wusterhausen, Brandenburg, Germany, ja Hartmut Ehrig. Recent Trends in Data Type Specification: 7th Workshop on Specification of Abstract Data Types, Wusterhausen/Dosse, Germany, April 17-20, 1990 : Proceedings. Springer-Verlag, 1991.