Cita APA (7a ed.)

Ringland, G. A., & Duce, D. A. (1988). Approaches to knowledge representation: An introduction. Research Studies [etc.].

Cita Chicago Style (17a ed.)

Ringland, Gordon A., y David A. Duce. Approaches to Knowledge Representation: An Introduction. Letchworth [etc.]: Research Studies [etc.], 1988.

Cita MLA (9a ed.)

Ringland, Gordon A., y David A. Duce. Approaches to Knowledge Representation: An Introduction. Research Studies [etc.], 1988.