APA

J. Gnagey W., . (1968). The psychology of discipline in the classroom. Estados Unidos: Gnagey.

Chicago

J. Gnagey William, . 1968. The psychology of discipline in the classroom. Estados Unidos: Gnagey.

Harvard

J. Gnagey W., . (1968). The psychology of discipline in the classroom. Estados Unidos: Gnagey.

MLA

J. Gnagey William, . The psychology of discipline in the classroom. Estados Unidos: Gnagey. 1968.