Final answer:
Industry-standard textbooks should be prioritized when selecting textbooks and reference books for training in an approved school. However, books recommended by local libraries and approved by the state board can also be considered.
Step-by-step explanation:
When it comes to selecting textbooks and reference books for training in an approved school, it is important to consider industry-standard textbooks. These books are widely accepted and recognized as the standard in the field. Additionally, approved schools may also consider books recommended by local libraries and books that are approved by the state board. However, it is crucial to prioritize industry-standard textbooks to ensure that students receive the most up-to-date and comprehensive training.