APA-referens

NORTHEN,Rebecca Tyson. (1955). ORCHIDS AS HOUSE PLANTS. D.VAN NOSTRAND CO.,INC.

Chicago-stil citat

NORTHEN,Rebecca Tyson. ORCHIDS AS HOUSE PLANTS. NEW YORK: D.VAN NOSTRAND CO.,INC, 1955.

MLA-referens

NORTHEN,Rebecca Tyson. ORCHIDS AS HOUSE PLANTS. D.VAN NOSTRAND CO.,INC, 1955.