Monger, G., & Sangster, M. (1988). Systematics and classification. Published for the Nuffield-Chelsea Curriculum Truct by Longman Group.
Lua i Stíl Chicago (17ú heag.)Monger, Grace, agus Mary Sangster. Systematics and Classification. England: Published for the Nuffield-Chelsea Curriculum Truct by Longman Group, 1988.
Lua MLA (9ú heag.)Monger, Grace, agus Mary Sangster. Systematics and Classification. Published for the Nuffield-Chelsea Curriculum Truct by Longman Group, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.