（美）斯皮尔著；徐匡译. 海狸的记号. 河北教育出版社.
Chicago Style (17th ed.) Citation（美）斯皮尔著；徐匡译. 海狸的记号. 河北教育出版社.
MLA (8th ed.) Citation（美）斯皮尔著；徐匡译. 海狸的记号. 河北教育出版社.
Warning: These citations may not always be 100% accurate.
APA (7th ed.) Citation