APA Citation

(1961). 1961 Britannica book of the year. Chicago: Encyclopaedia Britannica.

Trích dẫn kiểu Chicago

1961 Britannica Book of the Year. Chicago: Encyclopaedia Britannica, 1961.

MLA Citation

1961 Britannica Book of the Year. Chicago: Encyclopaedia Britannica, 1961.

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