APA引文

U.K.Singh & Sudarshan,K.N. (2004). Distance education. Discovery.

Chicago Edition Citation

U.K.Singh and Sudarshan,K.N. Distance Education. New Delhi: Discovery, 2004.

MLA引文

U.K.Singh and Sudarshan,K.N. Distance Education. Discovery, 2004.

警告：這些引文格式不一定是100％准確.