Hyatt, A. & Pilsbry, H. A. (1910-1911).
Manual of conchology, structural and systematic, with illustrations of the species. Ser. 2, Pulmonata. Vol. 21: Achatinellidae (Amastrinae). pp i-xxii, 1-387, pls 1-56. Philadelphia, published by the Conchological Department, Academy of Natural Sciences. [pp. 1-64, pls 1-9, 30 July 1910; pp. 65-128, pls 10-23, 14 March 1911; pp. 129-240, pls 24-36, 23 August 1911; pp. i-xxii, 241-387, pls 37-56, 19 December 1911].