[1] Google サイト運営者タグの概要 - DoubleClick for Publishers ヘルプ (4/3/2018, 3:18:39 PM) <https://support.google.com/dfp_premium/answer/181073?hl=ja>

[2] GPT Reference  |  Google Publisher Tag  |  Google Developers (2/13/2018, 9:49:40 PM) <https://developers.google.com/doubleclick-gpt/reference>