Valkenburg , M. E. V. (1974). Network analysis (3rd ed.). Prentice Hall.
Tohutoru Kātū Chicago (17th ed.)Valkenburg , M. E. Van. Network Analysis. 3rd ed. New Delhi: Prentice Hall, 1974.
Tohutoro MLA (9th ed.)Valkenburg , M. E. Van. Network Analysis. 3rd ed. Prentice Hall, 1974.
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