Cita APA (7a ed.)

Sharma, M. B., & Elbow, G. S. (2000). Using internet primary sources to teach critical thinking skills in geography. Greenwood Press.

Cita Chicago Style (17a ed.)

Sharma, Martha B., y Gary S. Elbow. Using Internet Primary Sources to Teach Critical Thinking Skills in Geography. Westport, Conn.: Greenwood Press, 2000.

Cita MLA (8a ed.)

Sharma, Martha B., y Gary S. Elbow. Using Internet Primary Sources to Teach Critical Thinking Skills in Geography. Greenwood Press, 2000.