Kipfer, B. A., & Roget, P. M. (1992). Roget's 21st century thesaurus in dictionary form: The essential reference for home, school, or office. Dell Pub.
Παραπομπή σε μορφή Chicago (17η εκδ.)Kipfer, Barbara Ann, και Peter Mark Roget. Roget's 21st Century Thesaurus in Dictionary Form: The Essential Reference for Home, School, or Office. New York, N.Y: Dell Pub, 1992.
Παραπομπή σε μορφή MLA (9th εκδ.)Kipfer, Barbara Ann, και Peter Mark Roget. Roget's 21st Century Thesaurus in Dictionary Form: The Essential Reference for Home, School, or Office. Dell Pub, 1992.
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