Is it a good (correct) way to encapsulate a collection?

class MyContainedClass {
};

class MyClass {
public:
  MyContainedClass * getElement() {
    // ...
    std::list<MyContainedClass>::iterator it = ... // retrieve somehow
    return &(*it);
  }
  // other methods
private:
  std::list<MyContainedClass> m_contained;
};

const MyContainedClass * getElement() const {
    // ...
    std::list<MyContainedClass>::const_iterator it = ... // retrieve somehow
    return &(*it);
  }

const MyContainedClass & getElement() const {
    // ...
    std::list<MyContainedClass>::const_iterator it = ... // retrieve somehow
    return *it;
  }

std::list<MyContainedClass>::const_iterator getElement() const {
    // ...
    std::list<MyContainedClass>::const_iterator it = ... // retrieve somehow
    return it;
  }

const MyContainedClass * getElement() const {
    // ...
    std::list<MyContainedClass>::const_iterator it = ... // retrieve somehow
    return &(*it);
  }

const MyContainedClass& getElement() const {
    // ...
    std::list<MyContainedClass>::const_iterator it = ... // retrieve somehow
    return *it;
  }

class Paragraph {
public:
  // getters and setters for private fields
private:
  FONTFACET m_fontFace;
  FONTSIZET m_fontSize;
  CONTENTT m_content;
}

class Document {
public:
  Paragraph * NewParagraph();
  void DeleteParagraph(Paragraph * p);
  Paragraph * GetParagraph(/*parameters to select particular paragraph*/) {
    std::list<Paragraph>::iterator it = // retrieve according to arguments
    return &(*it);
  }
  // getters and setters of document's properties
private:
  std::list<Paragraph> m_paragraphs;
  // other properties of Document
}

class ToolbarParagraphEditor: public ToolbarWidget {
public:
  // implementation.
private:
  Paragraph * m_paragraph;
}

class DialogParagraphEditor: public DialogWidget {
public:
  // implementation
private:
  Paragraph * m_paragraph;
}

class ParagraphSelectionDialog: public DialogWidget {
  // implementation
private:
  std::list<Paragraph *> m_selectedParagraphs; // Selection dialog doesn't own paragraphs
}