Παραπομπή σε μορφή APA (7η εκδ.)

Fisher, D. H., Pazzani, M. J., & Langley, P. (1991). Concept formation: Knowledge and experience in unsupervised learning. Morgan Kaufman Publishers.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Fisher, Douglas H., Michael J. Pazzani, και Pat Langley. Concept Formation: Knowledge and Experience in Unsupervised Learning. San Mateo: Morgan Kaufman Publishers, 1991.

Παραπομπή σε μορφή MLA (9th εκδ.)

Fisher, Douglas H., et al. Concept Formation: Knowledge and Experience in Unsupervised Learning. Morgan Kaufman Publishers, 1991.