Open Universityearth's Physical Resources Course Team & Open University, E. P. (1974). Implications. Open university press.
استشهاد بنمط شيكاغوOpen Universityearth's Physical Resources Course Team و Earth's Physic Open University. Implications. Open university press, 1974.
MLA استشهادOpen Universityearth's Physical Resources Course Team و Earth's Physic Open University. Implications. Open university press, 1974.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.