Cita APA (7a ed.)

Khanna, K. C., & Duggal, B. N. (1975). A course in social studies. Navdeep.

Cita Chicago Style (17a ed.)

Khanna, K. C., y B. N. Duggal. A Course in Social Studies. Delhi [u.a.]: Navdeep, 1975.

Cita MLA (9a ed.)

Khanna, K. C., y B. N. Duggal. A Course in Social Studies. Navdeep, 1975.