Não informado. (1987). Complex Systems. Complex Systems Publications.
Chicago-viite (17. p.)Não informado. Complex Systems. Champaign, Ill: Complex Systems Publications, 1987.
MLA-viite (8. p.)Não informado. Complex Systems. Complex Systems Publications, 1987.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.