APA引文

Costa,Otto De. (1989). Word Fun (NA.). Better Yourself Book.

芝加哥风格引文

Costa,Otto De. Word Fun. NA. Bombay: Better Yourself Book, 1989.

MLA引文

Costa,Otto De. Word Fun. NA. Better Yourself Book, 1989.

警告：这些引文格式不一定是100％准确.