APA Citation

Bord, J. (1989). Unexplained mysteries of the 20th century. New York: McGraw-Hill.

Trích dẫn kiểu Chicago

Bord, Janet. Unexplained Mysteries of the 20th Century. New York: McGraw-Hill, 1989.

MLA Citation

Bord, Janet. Unexplained Mysteries of the 20th Century. New York: McGraw-Hill, 1989.

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