Kruppa, J. R. (1968). A comparison of three teaching techniques using instructional films in selected units in industrial arts. [publisher not identified].
Chicago Style (17th ed.) CitationKruppa, J. Russell. A Comparison of Three Teaching Techniques Using Instructional Films in Selected Units in Industrial Arts. [Place of publication not identified]: [publisher not identified], 1968.
MLA (9th ed.) CitationKruppa, J. Russell. A Comparison of Three Teaching Techniques Using Instructional Films in Selected Units in Industrial Arts. [publisher not identified], 1968.
Warning: These citations may not always be 100% accurate.