APA

barrington e. g., . (1979). invertebrate structure and funtion. mairobi: thomas nelson & sons ltd.

Chicago

barrington e g.w, . 1979. invertebrate structure and funtion. mairobi: thomas nelson & sons ltd.

Harvard

barrington e. g., . (1979). invertebrate structure and funtion. mairobi: thomas nelson & sons ltd.

MLA

barrington e g.w, . invertebrate structure and funtion. mairobi: thomas nelson & sons ltd. 1979.