APA (7th ed.) Citation

Bentley, J. L., & Ottmann, T. (1981). The complexity of manipulating hierarchically definied sets of rectangles.

Chicago Style (17th ed.) Citation

Bentley, Jon Louis, and Thomas Ottmann. The Complexity of Manipulating Hierarchically Definied Sets of Rectangles. Pittsburgh, Pa, 1981.

MLA (9th ed.) Citation

Bentley, Jon Louis, and Thomas Ottmann. The Complexity of Manipulating Hierarchically Definied Sets of Rectangles. 1981.

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