Παραπομπή APA

Chopra, S., & Kanwar, J. (1959). Practical Agricultural Chemistry. S.Chand & company.

Παραπομπή Chicago Style

Chopra, S.L, και J.S Kanwar. Practical Agricultural Chemistry. Delhi: S.Chand & company, 1959.

Παραπομπή MLA

Chopra, S.L, και J.S Kanwar. Practical Agricultural Chemistry. S.Chand & company, 1959.