Minecraft wiki entry for Enchanting, associated text: A sword with 4 enchantments on it.
A diamond pickaxe with multiple high-level enchantments, right after enchanting.
Enchanting table enchanting window.
Place 15 bookshelves around an enchanting table to get the highest level enchantments.
A bow that has four enchantments.
A screenshot of the enchanting interface. Note that only 2 enchantment levels have been unlocked.
Table of enchantment probabilities for books.
The GUI of the enchantment table in Pocket Edition while the Pocket UI Profile is activated (top = no item, bottom = with item hovering on the second line).
Underwater, with and without the Respiration enchantment comparison. (Removed in 1.13)