APA-referens

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

Chicago-stil citat

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

MLA-referens

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