APA引文

Walkey O. R. & Subramania Aiyer. (1940). Concise general astronomy.

Chicago Edition Citation

Walkey O. R. and Subramania Aiyer. Concise General Astronomy. 1940.

MLA引文

Walkey O. R. and Subramania Aiyer. Concise General Astronomy. 1940.

警告：這些引文格式不一定是100％准確.