Não informado. (1958). Delta: A review of arts, life and thought in the Netherlands. Delta International Publication Foundation.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Delta: A Review of Arts, Life and Thought in the Netherlands. Amsterdam: Delta International Publication Foundation, 1958.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Delta: A Review of Arts, Life and Thought in the Netherlands. Delta International Publication Foundation, 1958.
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