APA (7th ed.) Citation

Kilpeläinen, P., & Mannila, H. (1991). Ordered and unordered tree inclusion.

Chicago Style (17th ed.) Citation

Kilpeläinen, Pekka, and Heikki Mannila. Ordered and Unordered Tree Inclusion. Helsinki, 1991.

MLA (9th ed.) Citation

Kilpeläinen, Pekka, and Heikki Mannila. Ordered and Unordered Tree Inclusion. 1991.

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