diff --git a/src/types/document.rs b/src/types/document.rs
index c8001e5..974d77b 100644
--- a/src/types/document.rs
+++ b/src/types/document.rs
@@ -1,3 +1,4 @@
+use super::macros::ref_getter;
 use super::Element;
 use super::GetStandardProperties;
 use super::Object;
@@ -8,9 +9,9 @@ pub type HeadlineLevel = u16;
 
 #[derive(Debug)]
 pub struct Document<'s> {
-    pub source: &'s str,
-    pub zeroth_section: Option<Section<'s>>,
-    pub children: Vec<Heading<'s>>,
+    pub(crate) source: &'s str,
+    pub(crate) zeroth_section: Option<Section<'s>>,
+    pub(crate) children: Vec<Heading<'s>>,
 }
 
 #[derive(Debug)]
@@ -70,3 +71,8 @@ impl<'s> StandardProperties<'s> for Heading<'s> {
         self.source
     }
 }
+
+impl<'s> Document<'s> {
+    ref_getter!(get_zeroth_section, zeroth_section, Option<Section<'s>>);
+    ref_getter!(get_children, children, Vec<Heading<'s>>);
+}