APA (7th ed.) Citation

Ibarra, O. H., & Kim, C. E. (1975). A useful device for showing the solvability of some decision problems. U.P. Natural Science Research Center.

Chicago Style (17th ed.) Citation

Ibarra, Oscar H., and Chul E. Kim. A Useful Device for Showing the Solvability of Some Decision Problems. Quezon City: U.P. Natural Science Research Center, 1975.

MLA (9th ed.) Citation

Ibarra, Oscar H., and Chul E. Kim. A Useful Device for Showing the Solvability of Some Decision Problems. U.P. Natural Science Research Center, 1975.