Cita APA (7a ed.)

Johnson, P. E. (1971). Learning: Theory and practice. Crowell.

Cita Chicago Style (17a ed.)

Johnson, Paul Erick. Learning: Theory and Practice. New York: Crowell, 1971.

Cita MLA (9a ed.)

Johnson, Paul Erick. Learning: Theory and Practice. Crowell, 1971.