APA
Brown D. S., . (1980). Freshwater snails of Africa and their medical importance. London: Taylor & Francis.
Chicago
Brown D S, . 1980. Freshwater snails of Africa and their medical importance. London: Taylor & Francis.
Harvard
Brown D. S., . (1980). Freshwater snails of Africa and their medical importance. London: Taylor & Francis.
MLA
Brown D S, . Freshwater snails of Africa and their medical importance. London: Taylor & Francis. 1980.