"Chinese Plus" [一件通] ; "Chinese Plus" [一件通] ; "Pen Plus" [一笔通].

MLA

"chinese Plus" [一件通] ; "chinese Plus" [一件通] ; "pen Plus" [一笔通]. Singapore: Bider, n.d.

APA

(n.d). "Chinese Plus" [一件通] ; "Chinese Plus" [一件通] ; "Pen Plus" [一笔通]. Singapore: Bider.

Chicago

"chinese Plus" [一件通] ; "chinese Plus" [一件通] ; "pen Plus" [一笔通]. Singapore: Bider, n.d.