APA (7th ed.) Citation

Yang, Y., & John, R. (2012). Grey sets and greyness. Elsevier.

Chicago Style (17th ed.) Citation

Yang, Yingjie, and Robert John. Grey Sets and Greyness. Elsevier, 2012.

MLA (9th ed.) Citation

Yang, Yingjie, and Robert John. Grey Sets and Greyness. Elsevier, 2012.

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