อ้างอิง ของ นักร้องคอนเสิร์ต (เอคินส์)

  1. ↑ The Concert Singer: 1890-1892. Philadelphia Museum of Art. Retrieved February 22, 2009
  2. ↑ Of his many full-length portraits, The Concert Singer is one of only two that Eakins painted of women. Sewell et al. 2001, p. 311
  3. ↑ Goodrich 1982, vol. II, pp. 83-84