APA

Dietz, C., Nill, D., & Helversen, O. . (2009). Bats of Britain, Europe and Northwest Africa. London: A & C Black.

MLA

Dietz, Christian, Dietmar Nill, and Otto . Helversen. Bats of Britain, Europe and Northwest Africa. London: A & C Black, 2009. Print.

CHICAGO

Dietz, Christian, Dietmar Nill, and Otto von Helversen. 2009. Bats of Britain, Europe and Northwest Africa. London: A & C Black.

HARVARD

DIETZ, C., NILL, D., & HELVERSEN, O. V. (2009). Bats of Britain, Europe and Northwest Africa. London, A & C Black.

TURABIAN

Dietz, Christian, Dietmar Nill, and Otto von Helversen. Bats of Britain, Europe and Northwest Africa. London: A & C Black, 2009.