APA (7th ed.) Zitazioa
McKean, J. (1995). Tree of heaven: Poems. University of Iowa Press.
Chicago Style (17th ed.) Zitazioa
McKean, James. Tree of Heaven: Poems. Iowa City: University of Iowa Press, 1995.
MLA (9th ed.) Zitazioa
McKean, James. Tree of Heaven: Poems. University of Iowa Press, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.