APA-referens (7:e uppl.)

Öpik, A. A. (1982). Dolichometopid trilobites of Queensland, Northern Territory, and New South Wales. Australian Govt. Pub. Service.

Chicago-referens (17:e uppl.)

Öpik, A. A. Dolichometopid Trilobites of Queensland, Northern Territory, and New South Wales. Canberra: Australian Govt. Pub. Service, 1982.

MLA-referens (8:e uppl.)

Öpik, A. A. Dolichometopid Trilobites of Queensland, Northern Territory, and New South Wales. Australian Govt. Pub. Service, 1982.