APA aipamena

B Howard & Howard B Suprague. (1959). Grasslands. American association for the advancment of science.

Chicago Style aipamena

B Howard and Howard B Suprague. Grasslands. American association for the advancment of science, 1959.

MLA aipamena

B Howard and Howard B Suprague. Grasslands. American association for the advancment of science, 1959.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.