APA

Schawarz P. A., Krug R. E., . (1972). Ability testing in developing countries. New York: Praeger Publishers.

Chicago

Schawarz Paul A, Krug Robert E, . 1972. Ability testing in developing countries. New York: Praeger Publishers.

Harvard

Schawarz P. A., Krug R. E., . (1972). Ability testing in developing countries. New York: Praeger Publishers.

MLA

Schawarz Paul A, Krug Robert E, . Ability testing in developing countries. New York: Praeger Publishers. 1972.