Παραπομπή APA

Wittich, W. A., & Halsted, G. H. (1966). Educators guide to free tapes, scripts, and transcriptions (13th ed.). Randolph: Educators Progress Service.

Παραπομπή Chicago Style

Wittich, Walter A., and Gertie Hanson Halsted. Educators Guide to Free Tapes, Scripts, and Transcriptions. 13th ed. Randolph: Educators Progress Service, 1966.

Παραπομπή MLA

Wittich, Walter A., and Gertie Hanson Halsted. Educators Guide to Free Tapes, Scripts, and Transcriptions. 13th ed. Randolph: Educators Progress Service, 1966.

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