APA aipamena

Singh, S., & Singh, T. H. (1974). Cotton in the Punjab. Punjab Agricultural University.

Chicago Style aipamena

Singh, Sucha, and Tejinder Harpal Singh. Cotton in the Punjab. Ludhiana: Punjab Agricultural University, 1974.

MLA aipamena

Singh, Sucha, and Tejinder Harpal Singh. Cotton in the Punjab. Punjab Agricultural University, 1974.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.