Kaufman, K. (2001). Direct amendments, mas ok kaysa Concon-Angara. Kabayan.
Cita Chicago (17th ed.)Kaufman, Karl. "Direct Amendments, Mas Ok Kaysa Concon-Angara." Kabayan 2001.
Cita MLA (9th ed.)Kaufman, Karl. "Direct Amendments, Mas Ok Kaysa Concon-Angara." Kabayan, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.