| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Gas Hearth Systems Exam Flashcard Study System: Gas Hearth Systems Test Practice Questions & Review for the Gas Hearth Systems Exam | 978-1-60971-842-8 (1-60971-842-9) | 2013 |
| Gas Hearth Systems Exam Secrets Study Guide: Gas Hearth Systems Test Review for the Gas Hearth Systems Exam | 978-1-60971-841-1 (1-60971-841-0) | 2013 |