Cita APA (7a ed.)

Boehm, R. G., & Petersen, J. F. (1997). The first assessment: Research in geographic education. Gilbert M. Grosvenor Center for Geographic Education, Southwest Texas State University.

Cita Chicago Style (17a ed.)

Boehm, Richard G., y James F. Petersen. The First Assessment: Research in Geographic Education. San Marcos, TX: Gilbert M. Grosvenor Center for Geographic Education, Southwest Texas State University, 1997.

Cita MLA (9a ed.)

Boehm, Richard G., y James F. Petersen. The First Assessment: Research in Geographic Education. Gilbert M. Grosvenor Center for Geographic Education, Southwest Texas State University, 1997.