Kruuk, H. Otters. Oxford University Press.
Chicago Style (17th ed.) CitationKruuk, H. Otters. Oxford University Press.
MLA引文Kruuk, H. Otters. Oxford University Press.
警告：這些引文格式不一定是100％准確.
APA引文
Kruuk, H. Otters. Oxford University Press.
Chicago Style (17th ed.) CitationKruuk, H. Otters. Oxford University Press.
MLA引文Kruuk, H. Otters. Oxford University Press.