APA
International Council of Scientific Unions. Special committee for th e International Biological Program, International Biological Program, . (1969). Directory of national participation in IBP. London: IBP Central office.
Chicago
International Council of Scientific Unions. Special committee for th e International Biological Program, International Biological Program, . 1969. Directory of national participation in IBP. London: IBP Central office.
Harvard
International Council of Scientific Unions. Special committee for th e International Biological Program, International Biological Program, . (1969). Directory of national participation in IBP. London: IBP Central office.
MLA
International Council of Scientific Unions. Special committee for th e International Biological Program, International Biological Program, . Directory of national participation in IBP. London: IBP Central office. 1969.