Engelhardt, D. F. (1968). Aspects of Spatial Influence on Science Teaching Methods.
Chicago Style (17th ed.) CitationEngelhardt, David Frederic. Aspects of Spatial Influence on Science Teaching Methods. 1968.
MLA (9th ed.) CitationEngelhardt, David Frederic. Aspects of Spatial Influence on Science Teaching Methods. 1968.
Warning: These citations may not always be 100% accurate.