APA (7th ed.) Zitazioa
Gerhard, P. (1972). A guide to the historical geography of New Spain. University Press.
Chicago Style (17th ed.) Zitazioa
Gerhard, Peter. A Guide to the Historical Geography of New Spain. Cambridge [Eng]: University Press, 1972.
MLA (9th ed.) Zitazioa
Gerhard, Peter. A Guide to the Historical Geography of New Spain. University Press, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.