Cita APA (7th ed.)

O'Brien, D. P., & Swann, D. (1969). Information agreements, competition and efficiency. A.M. Kelley.

Cita Chicago (17th ed.)

O'Brien, D. P., i Dennis Swann. Information Agreements, Competition and Efficiency. New York: A.M. Kelley, 1969.

Cita MLA (8th ed.)

O'Brien, D. P., i Dennis Swann. Information Agreements, Competition and Efficiency. A.M. Kelley, 1969.