Harvard:
Ballard, W.L. xxxx, "The history and development of tonal systems and tone alternation in South China",
APA:
Ballard, W.L. (xxxx). The history and development of tonal systems and tone alternation in South China. .
Chicago:
Ballard, William L. xxxx. "The History and Development of Tonal Systems and Tone Alternation in South China." .
MLA:
Ballard, William L. "The History and Development of Tonal Systems and Tone Alternation in South China." (xxxx): .
Citation within the text:
(Ballard xxxx)
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BibTeX:
@article{ballardxxxxhistory,
  title = {The history and development of tonal systems and tone alternation in South China},
  author = {BALLARD, William L.},
  year = {xxxx},
  address = {Study of Languages and Cultures of Asia & Africa Monograph Series, 22.},
  keywords = {China;Language;Linguistics},
  x-extra = {Study of Languages and Cultures of Asia & Africa Monograph Series, 22.},
  BAS = {69815},
  source = {bas},
}