Παραπομπή APA

(1982). Proceedings of the 15th Symposium on Ring Theory. Bình Trị Thiên: Sở Văn hoá thông tin.

Παραπομπή Chicago Style

Proceedings of the 15th Symposium On Ring Theory. Bình Trị Thiên: Sở Văn hoá thông tin, 1982.

Παραπομπή MLA

Proceedings of the 15th Symposium On Ring Theory. Bình Trị Thiên: Sở Văn hoá thông tin, 1982.

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