Harvard:
Bieri, D. and Schulze, M. xxxx, "A guide to Sunwar tone",
APA:
Bieri, D. and Schulze, M. (xxxx). A guide to Sunwar tone. .
Chicago:
Bieri, Dora and Marlene Schulze. xxxx. "A Guide To Sunwar Tone." .
MLA:
Bieri, Dora and Marlene Schulze. "A Guide To Sunwar Tone." (xxxx): .
Citation within the text:
(Bieri & Schulze xxxx)
Zotero:
Save reference in Zotero
BibTeX:
@article{bierixxxxguide,
  title = {A guide to Sunwar tone},
  author = {BIERI, Dora and SCHULZE, Marlene},
  year = {xxxx},
  address = {Guide to tone in Nepal, 4},
  keywords = {Nepal;Language;Linguistics},
  x-extra = {Guide to tone in Nepal, 4},
  BAS = {89669},
  source = {bas},
}