Harvard:
Menh, N.V. and Boscher, W. xxxx, "Aufbaukurs Vietnamesisch",
APA:
Menh, N.V. and Boscher, W. (xxxx). Aufbaukurs Vietnamesisch. .
Chicago:
Menh, Nguyen Van and Winfried Boscher. xxxx. "Aufbaukurs Vietnamesisch." .
MLA:
Menh, Nguyen Van and Winfried Boscher. "Aufbaukurs Vietnamesisch." (xxxx): .
Citation within the text:
(Menh & Boscher xxxx)
Zotero:
Save reference in Zotero
BibTeX:
@article{menhxxxxaufbaukurs,
  title = {Aufbaukurs Vietnamesisch},
  author = {MENH, Nguyen Van and BOSCHER, Winfried},
  year = {xxxx},
  keywords = {Vietnam;Language;Study & Teaching},
  BAS = {440713},
  source = {bas},
}