APA (7th ed.) Zitazioa

Lachapelle , E. R. (1969). Field guide to snow crystals. University of washington pr.

Chicago Style (17th ed.) Zitazioa

Lachapelle , Edward R. Field Guide to Snow Crystals. London: University of washington pr, 1969.

MLA (9th ed.) Zitazioa

Lachapelle , Edward R. Field Guide to Snow Crystals. University of washington pr, 1969.