Clawson, D. L. 1., & Airriess, C. A. (2007). World regional geography: A development approach (9. bs.). Upper Saddle River, N.J.: Pearson Prentice Hall.
استشهاد بنمط شيكاغوClawson, David L. 1948-, and Christopher A. Airriess. World Regional Geography: A Development Approach. 9. bs. Upper Saddle River, N.J.: Pearson Prentice Hall, 2007.
MLA استشهادClawson, David L. 1948-, and Christopher A. Airriess. World Regional Geography: A Development Approach. 9. bs. Upper Saddle River, N.J.: Pearson Prentice Hall, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.