2.0 2.1 ActionGrammar by Joanne Feierman (found in the chapter “Mistakes Your Boss Minds the Most”, in the section “Twenty More Language Pet Peeves”, on page 26, and also listed on page 212)

3.0 3.1 The Dictionary of Disagreeable English by Fiske, page 136

5.0 5.1 The Broadview Guide to Writing by Doug Babington & Don LePan, page 241 (3rd Ed., 2005)

6.0 6.1 The How of WOW: A Guide to Giving a Speech That Will Positively Blow ‛Em Away by Tony Carlson, page 159 (2005)

7.0 7.1 Write Right!: A Desktop Digest of Punctuation, Grammar, and Style by Jan Venolia, page 112 (2001)

8.0 8.1 Anguished English: An Anthology of Accidental Assaults Upon the English Language by Richard Lederer, page 178 (2006)