| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Mary Long's Complete Directory To Cruise Lines International | 978-0-9666733-8-8 (0-9666733-8-7) | 2000 |
| The Complete Guide To Conducting Seminars At Sea | 978-0-9666733-0-2 (0-9666733-0-1) | 1999 |
M.-L. · M. Long · Mary Ann Long · Mary K. Long · Mary L. · Mary Long CPMSM · Mary Long Harvey