Cita APA

Heckerman, D. E., Horvitz, E. J., & Nathwani, B. N. (1989). The Pathfinder System.

Chicago Style Citation

Heckerman, David E., Eric J. Horvitz, i Bharat N. Nathwani. The Pathfinder System. 1989.

Cita MLA

Heckerman, David E., Eric J. Horvitz, i Bharat N. Nathwani. The Pathfinder System. 1989.