Harvard:
Yamada, Y. and Tsuchida, S. xxxx, "Philippine languages",
APA:
Yamada, Y. and Tsuchida, S. (xxxx). Philippine languages. .
Chicago:
Yamada, Yukihiro and Shigeru Tsuchida. xxxx. "Philippine Languages." .
MLA:
Yamada, Yukihiro and Shigeru Tsuchida. "Philippine Languages." (xxxx): .
Citation within the text:
(Yamada & Tsuchida xxxx)
Zotero:
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BibTeX:
@article{yamadaxxxxphilippine,
  title = {Philippine languages},
  author = {YAMADA, Yukihiro and TSUCHIDA, Shigeru},
  year = {xxxx},
  address = {Asian and African grammatical manual, no.15b},
  keywords = {Philippines;Language},
  x-extra = {Asian and African grammatical manual, no.15b},
  BAS = {666315},
  source = {bas},
}