Singh, P. B. (2000). Galgotia's objective chemistry for competitive examinations: P.B. Singh. Galgotia Publications.
Citazione stile Chigago Style (17a edizione)Singh, P. B. Galgotia's Objective Chemistry for Competitive Examinations: P.B. Singh. New Delhi: Galgotia Publications, 2000.
Citatione MLA (9a ed.)Singh, P. B. Galgotia's Objective Chemistry for Competitive Examinations: P.B. Singh. Galgotia Publications, 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.