Peter Orton · Peter Z., Phd Orton · PhD Peter Z. Orton
| title | media type | ISBN-13 | year of publica- tion | other author(s) | 
|---|---|---|---|---|
| 30 Days to the Sat | Paperback | 978-0-02-861262-1 | 1996 | Rajiv N. Rimal | 
| Barron's Civil Service Examination: For Stenographer, Typist, Clerk, and Office Machine Operator | " | 978-0-7641-0777-1 | 2000 | Jerry Bobrow · William A. Covino | 
| California Basic Educational Skills Test: Preparation Guide | " | 978-0-8220-2030-1 | 1983 | Jerry Bobrow · William A. Covino | 
| Cliff's Graduate Record Examination General Test: Preparation Guide | " | 978-0-8220-2073-8 | 1995 | Jerry Bobrow · William A Covino | 
| Cliffs law school admission test: Preparation guide | " | 978-0-8220-2023-3 | 1991 | |
| Cliffs law school admission test: Preparation guide | " | 978-0-8220-2065-3 | 1989 | |
| Cliffs law school admission test: Preparation guide | " | 978-0-8220-2021-9 | 1983 | |
| Cliffs LSAT Preparation Guide | " | 978-0-8220-2066-0 | 1983 | |
| CliffsNotes Statistics Quick Review, 2nd Edition | " | 978-0-470-90260-8 | 2011 | Scott Adams · David H Voelker | 
| CliffsQuickReview Statistics | Digital | 978-0-7645-2392-2 | 2001 | David H. Voelker | 
| CliffsQuickReview Statistics | Paperback | 978-0-7645-6388-1 | 2001 | David H. Voelker · Scott Adams | 
| CliffsQuickReview Statistics | " | 978-0-8220-5349-1 | 1993 | David H. Voelker | 
| CliffsTestPrep GMAT CAT | " | 978-0-8220-2062-2 | 1980 | Jerry Bobrow · William A. Covino · Harold Nathan · David A. Kay · Dale Johnson | 
| Cliffstestprep LSAT. 5th Edition | Unbound | 978-0-7645-1706-8 | 2002 | |
| CliffsTestPrep LSAT, 5th Edition | Paperback | 978-0-7645-6395-9 | 2001 | |
| GED Mathematics Test Preparation Guide | " | 978-0-8220-2016-5 | 1983 | Deborah W. Moran · Wendy R. Taub | 
| GED, You Can Pass the GED | " | 978-0-8220-2077-6 | 1989 | Jerry Bobrow Ph.D. · Harold D. Nathan | 
| Tasp Preparation Guide | " | 978-0-8220-2042-4 | 1991 | Jerry Bobrow · Robert Dixon-Kolar | 
| Verbal Review for Standardized Tests | " | 978-0-8220-2034-9 | 1986 | William A. Covino | 
Barrons Educational Series · Cliffs Notes · John Wiley & Sons · Macmillan · Wiley