APA (7th ed.) Citation

Gottlob, G., Leone, N., & Scarcello, F. (1999). Hypertree Decompositions and Tractable Queries.

Chicago Style (17th ed.) Citation

Gottlob, G., N. Leone, and F. Scarcello. Hypertree Decompositions and Tractable Queries. 1999.

MLA (9th ed.) Citation

Gottlob, G., et al. Hypertree Decompositions and Tractable Queries. 1999.