APA (7th ed.) Citation

Foley, W. (1964). For rates above 50 per second, you need high-speed counters. Product Engineering., 35, 61.

Chicago Style (17th ed.) Citation

Foley, W. "For Rates Above 50 Per Second, You Need High-speed Counters." Product Engineering. 35 (1964): 61.

MLA (9th ed.) Citation

Foley, W. "For Rates Above 50 Per Second, You Need High-speed Counters." Product Engineering., vol. 35, 1964, p. 61.