Pokémon GO Wiki:Sources

Below there are listed all of the official sources of information about the game that comes straight from its creators. These are:
 * Niantic Labs Blog
 * Niantic Labs (Twitter)
 * Niantic Labs (Facebook)
 * Niantic Labs (Google +)
 * Pokemon Go Official page
 * Pokemon Go (Niantic Labs)
 * Pokemon Go (Twitter)
 * Pokemon Go (Facebook)
 * Pokémon Facebook
 * Pokémon Twitter
 * Pokémon US
 * Pokémon UK

Also Pokémon GO has only two official sources of download, and these are: