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 (17e ed.) Bronvermelding普雷格尔 en 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 (8e ed.) Bronvermelding普雷格尔 en 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.
Let op: Deze citaties zijn niet altijd 100% accuraat.