Harvard:
Lin, H.T. xxxx, "Essential grammar for modern Chinese",
APA:
Lin, H.T. (xxxx). Essential grammar for modern Chinese. .
Chicago:
Lin, Helen T. xxxx. "Essential Grammar For Modern Chinese." .
MLA:
Lin, Helen T. "Essential Grammar For Modern Chinese." (xxxx): .
Citation within the text:
(Lin xxxx)
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BibTeX:
@article{linxxxxessential,
  title = {Essential grammar for modern Chinese},
  author = {LIN, Helen T},
  year = {xxxx},
  keywords = {China;Language;Study & Teaching},
  BAS = {363863},
  source = {bas},
}