APA ציטוט

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

Chicago Edition Citation

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

ציטוט MLA

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