^Chinese American Names: Tradition and Transition – Page 118 Emma Woo Louie – 2008 "These were the Sam Yup and Sze Yup dialects, which the author spelled as “Saam Yup” and “Sz Yip,” respectively. Sam Yup means “Three Districts dialect,” which is akin to standard Cantonese, and Sze Yup means “Four Districts dialect.”
^Shanghai Girls – Page 8 Lisa See – 2010 "My first language was Sze Yup, the dialect spoken in the Four Districts in Kwangtung province, where our ancestral home is located...”