APA

Nielsen M., . (1965). Introduction to the flowering plants of west Africa. London: University of London Press.

Chicago

Nielsen M.s, . 1965. Introduction to the flowering plants of west Africa. London: University of London Press.

Harvard

Nielsen M., . (1965). Introduction to the flowering plants of west Africa. London: University of London Press.

MLA

Nielsen M.s, . Introduction to the flowering plants of west Africa. London: University of London Press. 1965.