Jansen, L. (1983). Sociocratische tendenties in West-Europa. WRR.
Tohutoru Kātū Chicago (17th ed.)Jansen, L. Sociocratische Tendenties in West-Europa. WRR, 1983.
Tohutoro MLA (9th ed.)Jansen, L. Sociocratische Tendenties in West-Europa. WRR, 1983.
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