（德）罗纳文；（德）温施图. 爷爷学游泳. 地震出版社.
Chicago Style (17th ed.) Citation（德）罗纳文；（德）温施图. 爷爷学游泳. 地震出版社.
MLA (8th ed.) Citation（德）罗纳文；（德）温施图. 爷爷学游泳. 地震出版社.
Warning: These citations may not always be 100% accurate.
APA (7th ed.) Citation