APA (7th ed.) Citation

Cheong, Q. W. (1971). Sampling system for the "SISIR" certification marking scheme.

Chicago Style (17th ed.) Citation

Cheong, Quee Wah. Sampling System for the "SISIR" Certification Marking Scheme. [Singapore, 1971.

MLA (8th ed.) Citation

Cheong, Quee Wah. Sampling System for the "SISIR" Certification Marking Scheme. 1971.

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