PEU (Practical English Usage) 4th
Michael Swan. Practical English Usage. Fourth edition
Michael Swan. Practical English Usage. Fourth edition
FreeDictionary Idioms
Dictionary of Architecture and Construction
Edited by Cyril M. Harris, Ph.D., Professor Emeritus of Architecture in the Graduate School of Architecture, Planning, and Preservation at Columbia University
Cambridge British Grammar Dictionary
Black’s Medical Dictionary, 43rd Edition
Oxford Student’s Dictionary for learners using English to study other subjects (with sounds and pictures)
The American Heritage® Dictionary of the English Language, Fifth Edition
Copyright © 2017 by Houghton Mifflin Harcourt Publishing Company.
Webster’s New World College Dictionary, 5th Edition