PMF IAS & Thamminidi, M. Human and Economic Geography: For UPSC and State Civil Services Examinations. PMF IAS.
Chicago-referens (17:e uppl.)PMF IAS och Manjunath Thamminidi. Human and Economic Geography: For UPSC and State Civil Services Examinations. New Delhi: PMF IAS.
MLA-referens (9:e uppl.)PMF IAS och Manjunath Thamminidi. Human and Economic Geography: For UPSC and State Civil Services Examinations. PMF IAS.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.