Asimov, I. (1987). Foundation and earth. Grafton Books.
Chicagoスタイル(17版)引用形式Asimov, Isaac. Foundation and Earth. Grafton Books, 1987.
MLA(8版)引用形式Asimov, Isaac. Foundation and Earth. Grafton Books, 1987.
警告: この引用は必ずしも正確ではありません.
APA(7版)引用形式