Yahr, M. D. (1983). H. Houston Merritt Memorial Volume. Raven Press.
Cita Chicago (17th ed.)Yahr, Melvin D. H. Houston Merritt Memorial Volume. New York: Raven Press, 1983.
Cita MLA (9th ed.)Yahr, Melvin D. H. Houston Merritt Memorial Volume. Raven Press, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.