APA-viite

Open Universityearth's Physical Resources Course Team & Open University, E. P. (1974). Implications. Open university press.

Chicago-tyylinen lähdeviittaus

Open Universityearth's Physical Resources Course Team ja Earth's Physic Open University. Implications. Open university press, 1974.

MLA-viite

Open Universityearth's Physical Resources Course Team ja Earth's Physic Open University. Implications. Open university press, 1974.