Harvard:
Voegelin, C.F., and F. M. Voegelin. 1977, "Classification and index of the world's languages,", Elsevier,.
APA:
Voegelin, C.F., and F. M. Voegelin. (1977). Classification and index of the world's languages,. . Elsevier,.
Chicago:
Voegelin, C. F., and F. M. Voegelin. 1977. "Classification and Index of the World's Languages,." . Elsevier,.
MLA:
Voegelin, C. F., and F. M. Voegelin. "Classification and Index of the World's Languages,." (1977): .
Citation within the text:
(Voegelin & F. 1977)
Zotero:
Save reference in Zotero
BibTeX:
@article{voegelin1977classification,
  author = {Voegelin, C. F., and {F. M. Voegelin}, {}},
  title = {Classification and index of the world's languages,},
  publisher = {Elsevier,},
  address = {New York},
  year = {1977},
  x-huffmanId = {5339},
  x-length = {658p.},
  source = {huffman-l-z},
}