Völkel, S., & Ohler, P. Understanding pictures in early childhood: Sabine Völkel. Peter Ohler. Origins of pictures : anthropological discourses in image science.(2013).
Chicago-viite (17. p.)Völkel, Sabine, ja Peter Ohler. "Understanding Pictures in Early Childhood: Sabine Völkel. Peter Ohler." Origins of Pictures : Anthropological Discourses in Image Science.(2013) .
MLA-viite (8. p.)Völkel, Sabine, ja Peter Ohler. "Understanding Pictures in Early Childhood: Sabine Völkel. Peter Ohler." Origins of Pictures : Anthropological Discourses in Image Science.(2013), .
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