Morrell Margot. (2002). Shackleton's Why: Leadership Lesson.. Great Antarctic explorer. Penguin books.
Lua i Stíl Chicago (17ú heag.)Morrell Margot. Shackleton's Why: Leadership Lesson.. Great Antarctic Explorer. USA: Penguin books, 2002.
Lua MLA (9ú heag.)Morrell Margot. Shackleton's Why: Leadership Lesson.. Great Antarctic Explorer. Penguin books, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.