APA Style

Hetterschcid, W., Hcnnipman, E. (1984). Venation patterns, soral characteristics, and shape of the fronds of the microsorioid Polypodiaceae . Stuttgart: .

MLA Style

Hetterschcid, W.L.A.., Hcnnipman, E.. "Venation patterns, soral characteristics, and shape of the fronds of the microsorioid Polypodiaceae". Stuttgart: , 1984. Text.