APA (7th ed.) Citation

Heffron, J. K., Dillon, A., & Mostafa, J. (1996). Landmarks in the World Wide Web: A Preliminary Study.

Chicago Style (17th ed.) Citation

Heffron, Jennifer K., Andrew Dillon, and Javed Mostafa. Landmarks in the World Wide Web: A Preliminary Study. 1996.

MLA (9th ed.) Citation

Heffron, Jennifer K., et al. Landmarks in the World Wide Web: A Preliminary Study. 1996.