普雷格尔 & 鲁比. (2016). 永远在一起: You're gone but you're still here. 北京少年儿童出版社.
Chicago Style (17. basım) Atıf普雷格尔 ve 鲁比. 永远在一起: You're Gone but You're Still Here. 北京少年儿童出版社, 2016.
MLA (8th ed.) Atıf普雷格尔 ve 鲁比. 永远在一起: You're Gone but You're Still Here. 北京少年儿童出版社, 2016.
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