APA

(1959). Learning to work in groups. New York: Bureau of Publications, Teachers College, Columbia University.

Chicago

1959. Learning to work in groups. New York: Bureau of Publications, Teachers College, Columbia University.

Harvard

(1959). Learning to work in groups. New York: Bureau of Publications, Teachers College, Columbia University.

MLA

Learning to work in groups. New York: Bureau of Publications, Teachers College, Columbia University. 1959.