Gwinn, R. P. (1973). 1974 Britannica yearbook of science and the future. Britain: Helen Hemingway Benton.
シカゴスタイル引用形Gwinn, Robert P. 1974 Britannica Yearbook of Science and the Future. Britain: Helen Hemingway Benton, 1973.
MLA引用形式Gwinn, Robert P. 1974 Britannica Yearbook of Science and the Future. Britain: Helen Hemingway Benton, 1973.
警告: この引用は必ずしも正確ではありません.