APA-viite (7. p.)

American Petroleum Institute. Exploration and Production Dept. (1993). Model form of voluntary unit operating agreement (4th ed.). American Petroleum Institute.

Chicago-viite (17. p.)

American Petroleum Institute. Exploration and Production Dept. Model Form of Voluntary Unit Operating Agreement. 4th ed. Washington, D.C.: American Petroleum Institute, 1993.

MLA-viite (8. p.)

American Petroleum Institute. Exploration and Production Dept. Model Form of Voluntary Unit Operating Agreement. 4th ed. American Petroleum Institute, 1993.