“Otto Von Bismarck: The Master Diplomat of Germany ” (2022) iJournals:International Journal of Social Relevance & Concern ISSN:2347-9698, 10(9). पर उपलब्ध: https://ijournals.in/journal/index.php/ijsrc/article/view/172 (अंतिम उपयोग: 21 अक्टूबर 2026).