Asimov, I. (1967). Environments out there. London: Abelard-Schuman.
Trích dẫn kiểu ChicagoAsimov, Isaac. Environments Out There. London: Abelard-Schuman, 1967.
MLA引文Asimov, Isaac. Environments Out There. London: Abelard-Schuman, 1967.
警告：這些引文格式不一定是100％准確.