Não informado. Oil Power. Socony Mobil Oil Company.
Chicago-viite (17. p.)Não informado. Oil Power. New York: Socony Mobil Oil Company.
MLA-viite (8. p.)Não informado. Oil Power. Socony Mobil Oil Company.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.