Harvard:
Ramos, T.V. xxxx, "The case system of Tagalog verbs",
APA:
Ramos, T.V. (xxxx). The case system of Tagalog verbs. .
Chicago:
Ramos, Teresita V. xxxx. "The Case System of Tagalog Verbs." .
MLA:
Ramos, Teresita V. "The Case System of Tagalog Verbs." (xxxx): .
Citation within the text:
(Ramos xxxx)
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BibTeX:
@article{ramosxxxxcase,
  title = {The case system of Tagalog verbs},
  author = {RAMOS, Teresita V.},
  year = {xxxx},
  address = {Pacific linguistics. Series B, no.27},
  keywords = {Philippines;Language},
  x-extra = {Pacific linguistics. Series B, no.27},
  BAS = {496457},
  source = {bas},
}