diff --git a/examples/src/main/java/com/example/CryptoPriceSample.java b/examples/src/main/java/com/example/CryptoPriceSample.java
index 8b24c7e..68b897b 100644
--- a/examples/src/main/java/com/example/CryptoPriceSample.java
+++ b/examples/src/main/java/com/example/CryptoPriceSample.java
@@ -19,6 +19,7 @@ public class CryptoPriceSample {
             System.out.println("The current Bitcoin price is " + euroPrice.getAmount() + " in Euros");
 
             // Get current Bitcoin buy price using API.
+            // See: https://developers.coinbase.com/api/v2#get-buy-price
             final CryptoPrice buyPrice =
                     CryptoPrice.toPrice(
                             CryptoPrice.apiCall(
diff --git a/examples/src/main/kotlin/com/example/CryptoPriceExample.kt b/examples/src/main/kotlin/com/example/CryptoPriceExample.kt
index 72c5f6a..f38bbba 100644
--- a/examples/src/main/kotlin/com/example/CryptoPriceExample.kt
+++ b/examples/src/main/kotlin/com/example/CryptoPriceExample.kt
@@ -14,6 +14,7 @@ fun main(@Suppress("UNUSED_PARAMETER") args: Array<String>) {
     println("The current Bitcoin price is ${euroPrice.amount} in Euros")
 
     // Get current Bitcoin buy price using API.
+    // See: https://developers.coinbase.com/api/v2#get-buy-price
     var buyPrice = apiCall(listOf("prices", "BTC-USD", "buy"), emptyMap()).toPrice()
     println("The current BTC buy price is ${buyPrice.amount} in ${buyPrice.currency}")