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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Finnish Designers Association Ornamo Unioninkatu <Helsinki>, Yrjö Sotamaa, و 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Finnish 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.