奥尔弗斯 & 马阳阳. (2021). 蓝袜子小比利: Story of little Billy bluesocks. 北京联合出版公司.
Chicago Style (17th ed.) Citation奥尔弗斯 and 马阳阳. 蓝袜子小比利: Story of Little Billy Bluesocks. 北京联合出版公司, 2021.
MLA (8th ed.) Citation奥尔弗斯 and 马阳阳. 蓝袜子小比利: Story of Little Billy Bluesocks. 北京联合出版公司, 2021.
Warning: These citations may not always be 100% accurate.