孙永生. (2023). 户外运动: Outdoor sports. 辽宁人民出版社.
Chicago Style (17th ed.) Citation孙永生. 户外运动: Outdoor Sports. 辽宁人民出版社, 2023.
MLA citiranje孙永生. 户外运动: Outdoor Sports. 辽宁人民出版社, 2023.
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