↑ Thuật ngữ bắt nguồn từ tiếng Đức này được đặt ra theo nghĩa bóng của "nơi trẻ em có thể phát triển một cách tự nhiên" "như những cái cây trong vườn", không phải theo nghĩa đen trong tiếng Đức "garten" (khu vườn)
↑ Samuel Lorenzo Knapp (1843), Female biography; containing notices of distinguished women, in different nations and ages. Philadelphia: Thomas Wardle. p. 230.
↑ “Learning is fun at Kinder School”. Preschool and Kindergarten (bằng tiếng en-US). 7 tháng 2 năm 2017. Truy cập ngày 18 tháng 4 năm 2017. Bảo trì CS1: Ngôn ngữ không rõ (link)
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