Cita APA (7a ed.)

Johnson, C. W., & Johnson, G. (1971). Territorial Imperative...in Print.

Cita Chicago Style (17a ed.)

Johnson, Charles W., y Gertrude Johnson. Territorial Imperative...in Print. 1971.

Cita MLA (9a ed.)

Johnson, Charles W., y Gertrude Johnson. Territorial Imperative...in Print. 1971.