APA (7th ed.) Zitazioa
Spalding, V. M. (1909). Distribution and movements of desert plants.
Chicago Style (17th ed.) Zitazioa
Spalding, Volney M. Distribution and Movements of Desert Plants. Washington, 1909.
MLA (9th ed.) Zitazioa
Spalding, Volney M. Distribution and Movements of Desert Plants. 1909.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.