APA (7th ed.) Citation

Asted, P. C. (1975). A study of materials and aids for the blind in nature centers. [publisher not identified].

Chicago Style (17th ed.) Citation

Asted, Paul C. A Study of Materials and Aids for the Blind in Nature Centers. [Place of publication not identified]: [publisher not identified], 1975.

MLA (9th ed.) Citation

Asted, Paul C. A Study of Materials and Aids for the Blind in Nature Centers. [publisher not identified], 1975.