APA (7th ed.) Citation

Gupta, D. K., & O'Connor, S. (2021). Grey literature. Emerald Publishing Limited.

Chicago Style (17th ed.) Citation

Gupta, Dinesh K., and Steve O'Connor. Grey Literature. [Place of publication not identified]: Emerald Publishing Limited, 2021.

MLA (9th ed.) Citation

Gupta, Dinesh K., and Steve O'Connor. Grey Literature. Emerald Publishing Limited, 2021.