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APA Citation

Phạm, V. T. Bài tập thiên văn. Hà Nội: Giáo dục.

Trích dẫn kiểu Chicago

Phạm, Viết Trinh. Bài Tập Thiên Văn. Hà Nội: Giáo dục.

MLA Citation

Phạm, Viết Trinh. Bài Tập Thiên Văn. Hà Nội: Giáo dục.

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