International Society for Knowledge Organization. (2021). Knowledge Organization. Indeks Verlag.
Chicago-viite (17. p.)International Society for Knowledge Organization. Knowledge Organization. Frankfurt, Alemanha: Indeks Verlag, 2021.
MLA-viite (8. p.)International Society for Knowledge Organization. Knowledge Organization. Indeks Verlag, 2021.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.