Dyfyniad APA

Sloan, L. L. (1977). Reading aids for the partially sighted: A systematic classification and procedure for prescribing. Williams & Wilkins.

Dyfyniad Arddull Chicago

Sloan, Louise Littig. Reading Aids for the Partially Sighted: A Systematic Classification and Procedure for Prescribing. Baltimore: Williams & Wilkins, 1977.

Dyfyniad MLA

Sloan, Louise Littig. Reading Aids for the Partially Sighted: A Systematic Classification and Procedure for Prescribing. Williams & Wilkins, 1977.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.