APA Citatie

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

Chicago Style citaat

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

MLA citatie

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

Let op: Deze citaties zijn niet altijd 100% accuraat.