There is no single correct way to cite standards (and most citation styles do not have a category for standards), but it is important to be consistent. Before choosing a style, check to see if your instructor has provided any guidelines or expressed any preference.
The most important thing is to include enough information that anyone reading your citation can go and find the exact document you referenced. Standards can appear in different forms (draft, active, etc.) and the same standard can be issued by different bodies. Make sure you cite the right version.
Most standards citations include:
Standards citations may also include:
From IEEE Reference Guide, p. 15
Basic Format
Title of Standard, Standard number, Corporate author, location, date.
or
Title of Standard, Standard number, date.
Example
Frequency Response and Bias, NERC Reliability Standard BAL-003-0.1b, May 2009. [Online]. Available: http://www.nerc.com/files/BAL-003-0_1b.pdf
From APA Style Blog, How to cite quality standards and guidelines in APA style:
Basic Format
Standards Body. (Year). Title (Standard number). Retrieved from URL.
Example
International Organization for Standardization. (2016). Occupational health and safety management systems—Requirements with guidance for use (ISO/DIS Standard No. 45001). Retrieved from http://www.iso.org/iso/catalogue_detail?csnumber=63787
In-text
First citation: (International Organization for Standardization [ISO], 2016) or International Organization for Standardization (ISO, 2016).
Subsequent citations: (ISO, 2016) or ISO (2016).