APA aipamena

Tollner, E. W. (2002). Natural resources engineering. Iowa: Iowa State Press.

Chicago Style aipamena

Tollner, Ernest W. Natural Resources Engineering. Iowa: Iowa State Press, 2002.

MLA aipamena

Tollner, Ernest W. Natural Resources Engineering. Iowa: Iowa State Press, 2002.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.