Cita APA (7th ed.)

Wynbrandt, J., & Ludman, M. D. (1991). The encyclopedia of genetic disorders and birth defects. Facts on File.

Cita Chicago (17th ed.)

Wynbrandt, James, i Mark D. Ludman. The Encyclopedia of Genetic Disorders and Birth Defects. New York: Facts on File, 1991.

Cita MLA (8th ed.)

Wynbrandt, James, i Mark D. Ludman. The Encyclopedia of Genetic Disorders and Birth Defects. Facts on File, 1991.