APA

(19). Glacial environments. Oxford [u.a.]: Butterworths-Heinemann.

Chicago

19. Glacial environments. Oxford [u.a.]: Butterworths-Heinemann.

Harvard

(19). Glacial environments. Oxford [u.a.]: Butterworths-Heinemann.

MLA

Glacial environments. Oxford [u.a.]: Butterworths-Heinemann. 19.