APA (7th ed.) Citation

Richardson, E. C. (1930). Classification, theoretical and practical (3rd ed.). Shoe String Press.

Chicago Style (17th ed.) Citation

Richardson, Ernest Cushing. Classification, Theoretical and Practical. 3rd ed. Hamden, Conn: Shoe String Press, 1930.

MLA (9th ed.) Citation

Richardson, Ernest Cushing. Classification, Theoretical and Practical. 3rd ed. Shoe String Press, 1930.