APA
University of Rhode Islalnds. Department of Botany, . (1971). Nova Hedwigia. Kingston: Department of Botany, University of Rhode Islands.
Chicago
University of Rhode Islalnds. Department of Botany, . 1971. Nova Hedwigia. Kingston: Department of Botany, University of Rhode Islands.
Harvard
University of Rhode Islalnds. Department of Botany, . (1971). Nova Hedwigia. Kingston: Department of Botany, University of Rhode Islands.
MLA
University of Rhode Islalnds. Department of Botany, . Nova Hedwigia. Kingston: Department of Botany, University of Rhode Islands. 1971.