APA (7th ed.) Citation

Riggs, D. E. (1976). The Computer Subroutine in Information Handling.

Chicago Style (17th ed.) Citation

Riggs, Donald E. The Computer Subroutine in Information Handling. 1976.

MLA (9th ed.) Citation

Riggs, Donald E. The Computer Subroutine in Information Handling. 1976.

Warning: These citations may not always be 100% accurate.