- $6.96Mac AC Wall Adapter Plug Duckhead US Wall Charger AC Cord US Standard Duck Head for MacBook Mac iBook/iPhone/iPod AC Power Adapter Brick (2 PCs)Amazon
- $13.87The iBooks App on the iPad and iPhone (iOS 11 Edition): Introduction to the iPad and iPhone SeriesAmazon
- $9.99Mac UK Plug Adapter, England Travel DuckHead Adapter Type G Wall Plug with Fuse for All MacBooks Power Adaptor Block, 12W 30W iPhone/iPod/iBook Travel Charger etc (1 Pcs)Amazon
- $10.99AC Power Adapter Plug Travel Charger Wall Plug Converter US Standard Duck Head for Apple MacBook iPhone iPad iPod iBook (Pack of 1)Amazon