diff --git a/aiogram/bot/bot.py b/aiogram/bot/bot.py
index f151a2f2..d5aa5d65 100644
--- a/aiogram/bot/bot.py
+++ b/aiogram/bot/bot.py
@@ -1830,6 +1830,8 @@ class Bot(BaseBot, DataMixin, ContextInstanceMixin):
         for this to work and must have the appropriate administrator
         rights. Returns True on success.
 
+        Source: https://core.telegram.org/bots/api#banchatsenderchat
+
         :param chat_id: Unique identifier for the target chat or
             username of the target channel (in the format
             @channelusername)
@@ -1856,6 +1858,8 @@ class Bot(BaseBot, DataMixin, ContextInstanceMixin):
         The bot must be an administrator for this to work and must have
         the appropriate administrator rights. Returns True on success.
 
+        Source: https://core.telegram.org/bots/api#unbanchatsenderchat
+
         :param chat_id: Unique identifier for the target chat or
             username of the target channel (in the format
             @channelusername)