diff --git a/README.md b/README.md
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@@ -8,4 +8,6 @@
 ## 等待开发
 1. 谁有这本书
 2. 是否被借出
-3. 被谁借出
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+3. 被谁借出
+
+Libr API 参照: https://github.com/wahyd4/Libr
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