Galperin, P., Engeness, I., & Thomas, G. (2022). Psychological Significance and Difference Between Tools Use by Humans and Animals: P. Y. Galperin's Dissertation (1st ed. 2022.). Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-031-14929-0
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Galperin, P.Y, Irina Engeness, و Gethin Thomas. Psychological Significance and Difference Between Tools Use by Humans and Animals: P. Y. Galperin's Dissertation. 1st ed. 2022. Cham: Springer International Publishing : Imprint: Springer, 2022. https://doi.org/10.1007/978-3-031-14929-0.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Galperin, P.Y, et al. Psychological Significance and Difference Between Tools Use by Humans and Animals: P. Y. Galperin's Dissertation. 1st ed. 2022. Springer International Publishing : Imprint: Springer, 2022. https://doi.org/10.1007/978-3-031-14929-0.