Cita APA (7th ed.)

Simco, N. D., & James, G. G. (1976). Elementary logic. Dickenson Publishing Company.

Cita Chicago (17th ed.)

Simco, Nancy D., i Gene G. James. Elementary Logic. Encino, Calif.: Dickenson Publishing Company, 1976.

Cita MLA (9th ed.)

Simco, Nancy D., i Gene G. James. Elementary Logic. Dickenson Publishing Company, 1976.