APA aipamena

Hajela, T. N. Principles, Problems and Practice of Co-Operation. Shiva Lal Agarwala.

Chicago Style aipamena

Hajela, T. N. Principles, Problems and Practice of Co-Operation. Agra: Shiva Lal Agarwala.

MLA aipamena

Hajela, T. N. Principles, Problems and Practice of Co-Operation. Shiva Lal Agarwala.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.