Dicionário de sinónimos / Tertúlia Edípica
Larousse des citations françaises et étrangéres / dir. Robert Calier et al.
The shorter Oxford english dictionary on historical principles / prepared by William Little, H. W. Fowler, J. Coulson; revised and ed. by C. T. Onions
The compact edition of the Oxford English Dictionary : complete text reproduced micrographically / Oxford University Press