Quetico-Superior Wilderness Research Center & Lakela, O. (1962). Revised check-list of ferns and flowering plants of the Quetico-Superior Wilderness Research Center. the Center.
Chicago-referens (17:e uppl.)Quetico-Superior Wilderness Research Center och Olga Lakela. Revised Check-list of Ferns and Flowering Plants of the Quetico-Superior Wilderness Research Center. Ely, Minn.: the Center, 1962.
MLA-referens (8:e uppl.)Quetico-Superior Wilderness Research Center och Olga Lakela. Revised Check-list of Ferns and Flowering Plants of the Quetico-Superior Wilderness Research Center. the Center, 1962.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.