APA引文

Keller, A. C. (1937). Direct recording and reproducing materials for disk recording. Bell telephone system B-998.

Chicago Style Citation

Keller, A. C. "Direct Recording and Reproducing Materials for Disk Recording." Bell Telephone System B-998 1937.

MLA引文

Keller, A. C. "Direct Recording and Reproducing Materials for Disk Recording." Bell Telephone System B-998 1937.

警告：這些引文格式不一定是100％准確.