孙永生. (2023). 户外运动: Outdoor sports. 辽宁人民出版社.
Chicago Style aipamena孙永生. 户外运动: Outdoor Sports. 辽宁人民出版社, 2023.
MLA aipamena孙永生. 户外运动: Outdoor Sports. 辽宁人民出版社, 2023.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena