Cita APA (7th ed.)

McGuffin, W., & Pielou, D. (1972). Guide to Geometriadae of Canada (lepidoptera): Subfamily ennominae. The Entomological Society of Canada.

Cita Chicago (17th ed.)

McGuffin, W.C, i D.P Pielou. Guide to Geometriadae of Canada (lepidoptera): Subfamily Ennominae. Ottawa: The Entomological Society of Canada, 1972.

Cita MLA (9th ed.)

McGuffin, W.C, i D.P Pielou. Guide to Geometriadae of Canada (lepidoptera): Subfamily Ennominae. The Entomological Society of Canada, 1972.