Cita APA (7a ed.)

Smith, M. H., & Jennings, J. E. (1977). United States, Canada, Latin America, World Cultures, Asia, Europe (Discovery sheets.). The Fideler Company.

Cita Chicago Style (17a ed.)

Smith, Marion Hagens, y Jerry E. Jennings. United States, Canada, Latin America, World Cultures, Asia, Europe. Discovery sheets. Grand Rapids, Michigan Toronto, Canada: The Fideler Company, 1977.

Cita MLA (9a ed.)

Smith, Marion Hagens, y Jerry E. Jennings. United States, Canada, Latin America, World Cultures, Asia, Europe. Discovery sheets. The Fideler Company, 1977.