- Rachel McCollin. Advanced Use of Attachments in WordPress. envatotuts+, 2014.
- Part 1: Categories and Taxonomy Terms.
- Part 2: Creating Custom Queries.
- Part 3: Creating Categorised Gallery Pages.
- Part 4: Creating a ‘Featured Image’.
- Daniel Strongin. Organize Your WordPress Media Library with Folders. envatotuts+, 2019. *
- Feilicia Ceballos-Marroquin. Default WordPress Image Sizes and How to Add Custom Sizes. wpmudev, 2019.