Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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