Finnish Designers Association Ornamo Unioninkatu <Helsinki>, Sotamaa, Y., & Salovaara, J. (1976). Citeria on Children's Playthings and Playgrounds: Report of the international symposium Playthings-76 at Hanasaari Culture Centre 26.8. - 4.9.1976, Finland. Helsingin yliopiston Monistuspalvelu.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFinnish Designers Association Ornamo Unioninkatu <Helsinki>, Yrjö Sotamaa, और Juhani Salovaara. Citeria on Children's Playthings and Playgrounds: Report of the International Symposium Playthings-76 at Hanasaari Culture Centre 26.8. - 4.9.1976, Finland. Helsinki: Helsingin yliopiston Monistuspalvelu, 1976.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFinnish Designers Association Ornamo Unioninkatu <Helsinki>, et al. Citeria on Children's Playthings and Playgrounds: Report of the International Symposium Playthings-76 at Hanasaari Culture Centre 26.8. - 4.9.1976, Finland. Helsingin yliopiston Monistuspalvelu, 1976.