APA-viite (7. p.)

(1993). Oil Spill Prevention Progress Made In Developing Alaska Demonstration Programs.

Chicago-viite (17. p.)

Oil Spill Prevention Progress Made In Developing Alaska Demonstration Programs. 1993.

MLA-viite (9. p.)

Oil Spill Prevention Progress Made In Developing Alaska Demonstration Programs. 1993.

Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.