APA引文

English Language Services. (1950). Intensive course in english. English Languaje Services.

Chicago Style (17th ed.) Citation

English Language Services. Intensive Course in English. English Languaje Services, 1950.

MLA引文

English Language Services. Intensive Course in English. English Languaje Services, 1950.

警告：這些引文格式不一定是100％准確.