COWAN, H. J. (1977). The Masterbuilders. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)COWAN, Henry J. The Masterbuilders. John Wiley & Sons, 1977.
Lua MLA (8ú heag.)COWAN, Henry J. The Masterbuilders. John Wiley & Sons, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.