McGuffin, W., & Pielou, D. (1972). Guide to Geometriadae of Canada (lepidoptera): Subfamily ennominae. The Entomological Society of Canada.
Lua i Stíl Chicago (17ú heag.)McGuffin, W.C, agus D.P Pielou. Guide to Geometriadae of Canada (lepidoptera): Subfamily Ennominae. Ottawa: The Entomological Society of Canada, 1972.
Lua MLA (9ú heag.)McGuffin, W.C, agus D.P Pielou. Guide to Geometriadae of Canada (lepidoptera): Subfamily Ennominae. The Entomological Society of Canada, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.