APA (7th ed.) Citation

Hoppe, H. U. (1988). A grammar-based approach to unifying task-oriented and system-oriented interface descriptions.

Chicago Style (17th ed.) Citation

Hoppe, Heinz Ulrich. A Grammar-based Approach to Unifying Task-oriented and System-oriented Interface Descriptions. Sankt Augustin, 1988.

MLA (9th ed.) Citation

Hoppe, Heinz Ulrich. A Grammar-based Approach to Unifying Task-oriented and System-oriented Interface Descriptions. 1988.

Warning: These citations may not always be 100% accurate.