University of Pennsylvania. University Museum, Philadelphia Museum of Art, & Wardwell, A. (1986). African sculpture from the University Museum, University of Pennsylvania. Philadelphia Museum of Art.
Lua i Stíl Chicago (17ú heag.)University of Pennsylvania. University Museum, Philadelphia Museum of Art, agus Allen Wardwell. African Sculpture from the University Museum, University of Pennsylvania. Philadelphia, PA: Philadelphia Museum of Art, 1986.
Lua MLA (8ú heag.)University of Pennsylvania. University Museum, et al. African Sculpture from the University Museum, University of Pennsylvania. Philadelphia Museum of Art, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.