Cita APA (7a ed.)

Harley, R. K., & Lawrence, G. A. (1977). Visual impairment in the schools. Charles C. Thomas.

Cita Chicago Style (17a ed.)

Harley, Randall K., y G. Allen Lawrence. Visual Impairment in the Schools. Springfield, Illinois: Charles C. Thomas, 1977.

Cita MLA (9a ed.)

Harley, Randall K., y G. Allen Lawrence. Visual Impairment in the Schools. Charles C. Thomas, 1977.