Olsen, H. (1963). Painting portraits: How to capture likeness and personality. Oak Tree Press.
Lua i Stíl Chicago (17ú heag.)Olsen, Helen. Painting Portraits: How to Capture Likeness and Personality. London: Oak Tree Press, 1963.
Lua MLA (9ú heag.)Olsen, Helen. Painting Portraits: How to Capture Likeness and Personality. Oak Tree Press, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.